BEGIN:VCALENDAR VERSION:2.0 PRODID:-//https://phys.washington.edu//NONSGML iCalcreator 2.41.90// CALSCALE:GREGORIAN METHOD:PUBLISH UID:61663331-3234-4366-a433-323963316261 X-WR-RELCALID:7663eb4b-c942-4b71-ba05-45eecb92b950 X-WR-TIMEZONE:America/Los_Angeles X-WR-CALNAME:Subscribe to this calendar BEGIN:VTIMEZONE TZID:America/Los_Angeles TZUNTIL:20281105T090000Z BEGIN:STANDARD TZNAME:PST DTSTART:20231105T020000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 RDATE:20241103T020000 RDATE:20251102T020000 RDATE:20261101T020000 RDATE:20271107T020000 END:STANDARD BEGIN:DAYLIGHT TZNAME:PDT DTSTART:20240310T020000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 RDATE:20250309T020000 RDATE:20260308T020000 RDATE:20270314T020000 RDATE:20280312T020000 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:f7e0d3a0-d21d-4a6b-88e6-ab5d87b76a41 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240912T064054Z DESCRIPTION:Speaker: Sue Coppersmith\, University of New South Wales\n\nSto chastic resonance\, where noise synchronizes a system’s response to an ext ernal drive\, is a phenomenon that occurs in a wide variety of noisy syste ms ranging from the dynamics of neurons to the periodicity of ice ages. Th is talk will present theory and experiments on a quantum system that exhib its stochastic resonance — the quantum tunneling of the magnetization of a single Fe atom measured using spin-polarized scanning tunneling microscop y. Stochastic resonance is shown deep in the quantum regime\, where fluctu ations are driven by tunneling of the magnetization. An analytic theory wi th no adjustable parameters agrees quantitatively with experiment\, and pr ovides a path towards probing dynamics on time scales shorter than can be resolved experimentally. DTSTART;TZID=America/Los_Angeles:20240913T133000 DTEND;TZID=America/Los_Angeles:20240913T143000 LAST-MODIFIED:20240912T183151Z LOCATION:B421 SUMMARY:: Quantum stochastic resonance of individual Fe atoms TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-09-13/quantum-stochastic-resona nce-individual-fe-atoms END:VEVENT BEGIN:VEVENT UID:67c08e69-c196-4c6b-a78f-bff93e14812a DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240916T222506Z DESCRIPTION:Speaker: Dmitry Green\, Boston University\n\n\nWe utilize a not ion of 'combinatorial gauge symmetry'\, where the gauge symmetry involves not just local rotations of spins\, but also permutations of spins. This a llows construction of exact gauge invariant Hamiltonians using just two-bo dy interactions.\nModels constructed in this way include the Z2 toric code and the non-Abelian quaternion group quantum double\, as well as generali zations.\nNew models that are not well understood also emerge.\nAn advanta ge of the exact symmetry is that the topological energy gaps need not be l imited to a perturbative regime\, but could potentially persist for a wide r range of parameters.\nPossible realizations are discussed using arrays o f superconducting wires and Josephson junctions. \n\nOverall\, this appear s to be a promising new approach for constructing experimentally realizabl e models of topological spin liquids\, with potential applications for qua ntum computing. The use of the exact combinatorial gauge symmetry differen tiates it from previous perturbative approaches. DTSTART;TZID=America/Los_Angeles:20240918T123000 DTEND;TZID=America/Los_Angeles:20240918T133000 LAST-MODIFIED:20240916T233559Z LOCATION:PAB 421 SUMMARY:: Building Topological Quantum Matter in Superconducting Wire Array s TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-09-18/building-topological-quan tum-matter-superconducting-wire-arrays END:VEVENT BEGIN:VEVENT UID:430b9028-c66f-4a27-b7e9-0812c7b2abca DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241003T010901Z DESCRIPTION:Speaker: Taige Wang\, UC Berkeley\n\nIn the exploration of quan tum materials' electronic properties\, microwave techniques uniquely enabl e probing the electromagnetic response\, which reveals signatures of many exotic matter phases. Over the past decade\, the advent of scanning microw ave probes\, notably Microwave Impedance Microscopy (MIM)\, has facilitate d spatially resolved measurements\, which can serve as a nearly disorder-f ree local probe of electromagnetic response. We recently proposed a theore tical MIM response framework grounded in linear response theory\, allowing a more quantitative interpretation of the MIM signal and a more accurate analysis for 1D edge modes. In this talk\, I will first outline this frame work\, then apply it to study (fractional) quantum anomalous Hall insulato rs\, with Cr-doped Bi2Te3 and twisted MoTe2 as two examples. This approach not only demystifies several experimental observations but also identifie s unique experimental signatures distinguishing topological edge modes fro m trivial ones. Further\, I will demonstrate how MIM's frequency and momen tum resolution can be leveraged to investigate composite Fermi liquid and pseudo-gap phases. Time permitting\, I'll discuss related research on axio n dynamics in axion insulators via microwave techniques. DTSTART;TZID=America/Los_Angeles:20241007T140000 DTEND;TZID=America/Los_Angeles:20241007T150000 LAST-MODIFIED:20241003T010901Z LOCATION:B421 SUMMARY:: Probing exotic phases of matter with scanning microwave technique s TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-10-07/probing-exotic-phases-mat ter-scanning-microwave-techniques END:VEVENT BEGIN:VEVENT UID:993fd401-3f5a-447f-90fc-9c34ebde298a DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240924T003601Z DESCRIPTION:Speaker: Mo Chen\, UW MSE\n\nSuperconducting qubits are among t he leading platforms for realizing fault-tolerant quantum computation. How ever\, atomic-scale material defects\, known as two-level systems (TLS)\, naturally occur at the surfaces and interfaces of all materials that const itute superconducting qubits. These TLS defects limit the performance of s uperconducting qubits\, affecting both the coherence of individual physica l qubits\, and the optimization landscape of large-scale quantum processor s. \nIn this talk\, I will present a new approach that directly modifies t he properties of TLS through nanoscale engineering. This transforms TLS in to a potentially useful quantum resource\, opening new opportunities in th e superconducting qubit platform. I will discuss two primary directions my lab at the UW will pursue: 1. Quantum sensing\, with a focus on noise cha racterization in the superconducting qubit platform\; 2. Development of a new type of qubit based on individual TLS defects. DTSTART;TZID=America/Los_Angeles:20241010T123000 DTEND;TZID=America/Los_Angeles:20241010T132500 LAST-MODIFIED:20240924T003601Z LOCATION:PAT C520 SUMMARY:: New opportunities with defects in superconducting qubits TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-10-10/new-opportunities-defects -superconducting-qubits END:VEVENT BEGIN:VEVENT UID:6cfd32f9-9cd3-4f1f-9251-7fcdf1e12d3b DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241009T192945Z DESCRIPTION:Speaker: Shaffique Adam\, Washington University in St Louis\n\n The notion of a single 'magic angle' in twisted bilayer graphene has evolv ed into a fascinating array of magic angles and ranges each describing dif ferent facets of the material's behavior.  While the original continuum mo del predicted a nominal magic angle\, its simplicity ignored the intricate interplay of different physical phenomena.  For example\, lattice relaxat ion [1] near the magic angle shifts its value upward\, only to be countera cted by pseudomagnetic fields.  Including a symmetry allowed relaxation pa rameter changes this magic angle to a magic range.  Yet another magic angl e emerges from the coupling to phonons when the Fermi velocity equals the phonon sound velocity.  Building upon this rich tapestry of magical effect s\, we will discuss our recent work on the convergence of lattice relaxati on and Hartree interaction near the magic angle [2]. We unveil a previousl y unreported Lifshitz transition to a Fermi surface topology that supports a 'heavy fermion' pocket and an ultraflat band pinned to the Fermi energy . Analytical and numerical insights shed light on the narrow 'magic angle range' where the “heavy fermion” is stable and make predictions for its ex perimental observation.  We believe that the bands presented here are accu rate  at high temperature and provide a good starting point to understand the myriad of complex behavior observed in this system. [1] “Analytical Mo del for Atomic Relaxation in Twisted Moiré Materials” by MMA Ezzi\, GN Pal lewela\, C De Beule\, EJ Mele\, and S Adam\, arXiv:2401.00498 (2024)[2]  “ A self-consistent Hartree theory for lattice-relaxed magic-angle twisted b ilayer graphene” by MMA Ezzi\, L Peng\, Z Liu\, JHZ Chao\, GN Pallewela\, D Foo\, and S Adam arXiv:2404.17638 (2024) DTSTART;TZID=America/Los_Angeles:20241017T123000 DTEND;TZID=America/Los_Angeles:20241017T133000 LAST-MODIFIED:20241010T070747Z LOCATION:B421 SUMMARY:: A narrow magic window for ultraflat bands and emergent heavy ferm ions near the magic angle in twisted bilayer graphene TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-10-17/narrow-magic-window-ultra flat-bands-and-emergent-heavy-fermions-near-magic-angle END:VEVENT BEGIN:VEVENT UID:19d4f5a0-2c97-4d95-843e-94845b0fcecd DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241025T185308Z DESCRIPTION:Speaker: J. M. Taylor\, JQI/QuICS/NIST\n\nQuantum technologies provide new base capabilities which open up frontiers in sensing\, network ing\, and computation. I will discuss the promise quantum systems have in fundamental physics research\, from the direct detection of dark matter to exploring the ability of gravity to entangle objects. I will also highlig ht the many challenges to be overcome and the ways in which the nascent fi eld of quantum engineering can help tackle these challenges. In all cases\ , working with systems at the limits set by nature requires high degrees o f integration of complex systems to realize practical results. DTSTART;TZID=America/Los_Angeles:20241029T140000 DTEND;TZID=America/Los_Angeles:20241029T150000 LAST-MODIFIED:20241025T185356Z LOCATION:PAT C520 SUMMARY:: Exploring fundamental physics with quantum information science TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-10-29/exploring-fundamental-phy sics-quantum-information-science END:VEVENT BEGIN:VEVENT UID:91af02f8-04c5-4401-a1ce-0d8f4b1a1059 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241105T210252Z DESCRIPTION:Speaker: Jie Wang\, Temple University\n\nGeometry is one of the central principles in condensed matter physics: it efficiently compresses the information regarding fluctuation and entanglement of complex quantum states and strongly constrains the correlation of many particles. One of the most famous geometric implications in condensed matter physics is the elegant proof of robust quantization of the integer quantum Hall plateau\, due to Thouless\, Niu\, and Wu\, which relates Hall conductivity to flux space curvature. In general\, geometries are defined for arbitrary paramet er spaces\, and important geometric quantities also include metrics. This talk focuses on ideal bands\, which are quantum systems saturating geometr ic bounds in flux space. We show that ideal bands precisely realize the lo west Landau levels on curved space. Building upon ideal bands\, we systema tically construct their higher Landau level partners\, termed generalized Landau levels\, and demonstrate quantized geometric invariants. Geometrica lly\, ideal bands and generalized Landau levels are holomorphic curves and associated moving frames. Finally\, we discuss the Hall viscosity associa ted with ideal bands and generalized Landau levels\, which are response co efficients for area-preserving deformations and represent curvature in the moduli space. We explore the implications for moiré materials and propose moiré systems as an experimentally feasible platform to simulate quantum Hall problems on curved space. DTSTART;TZID=America/Los_Angeles:20241107T123000 DTEND;TZID=America/Los_Angeles:20241107T133000 LAST-MODIFIED:20241106T185445Z LOCATION:PAT C520 SUMMARY:: Geometric Response of Generalized Landau Levels and Moire Materia ls TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-11-07/geometric-response-genera lized-landau-levels-and-moire-materials END:VEVENT BEGIN:VEVENT UID:b2777ad7-5cf5-4f33-a379-2235eacb3f64 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241115T145827Z DESCRIPTION:Speaker: Yue Sun\, UC Berkeley\n\nThe advent of two-dimensional (2D) magnets has unlocked new opportunities in spintronics and quantum sc ience\; however\, a lack of effective characterization techniques has left many aspects of spin transport and twist-induced phenomena largely unexpl ored. In CrSBr\, the strong spin-exciton coupling offers unique potential for precise optical measurements of spin degrees of freedom. Using tempora lly and spatially resolved optical techniques\, our work demonstrates that magnon transport in CrSBr is mediated by long-range dipole–dipole interac tions—a fundamental feature of electrodynamics likely to govern spin propa gation at long wavelengths in the entire class of van der Waals magnets. F urthermore\, we employ magnons to probe twisted CrSBr interfaces\, where q uantitative information about interfacial exchange interactions and hoppin g can be obtained. Together\, these studies establish magnons as a powerfu l tool for probing interactions and uncovering new phenomena in 2D magnets and other quantum materials. DTSTART;TZID=America/Los_Angeles:20241120T133000 DTEND;TZID=America/Los_Angeles:20241120T143000 LAST-MODIFIED:20241115T145827Z LOCATION:B421 SUMMARY:: Magnons as a Window into Spin Transport and Twist induced Phenome na in a van der Waals Antiferromagnet TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-11-20/magnons-window-spin-trans port-and-twist-induced-phenomena-van-der-waals END:VEVENT BEGIN:VEVENT UID:37f981c4-3ec4-4344-9b6d-8573ed581308 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241115T150348Z DESCRIPTION:Speaker: Xirui Wang\, MIT\n\nUltrathin ferroelectrics have grea t potential in the creation of non-volatile memory devices with compact vo lume and low energy consumption. Different from the conventional top-down approach of thinning down bulk polar materials\, the bottom-up approach ba sed on van der Waals assembly can engineer 2D ferroelectrics out of non-fe rroelectric parent compounds. By cutting one monolayer boron nitride (BN) in half and stacking them in parallel\, we engineer an inversion-symmetry broken bilayer BN that hosts out-of-plane polarization. This polarization can be switched by an out-of-plane electric field through the in-plane sl iding motion between the BN layers[1]. We further generalize this sliding ferroelectricity concept to bilayer transition metal dichalcogenides[2]. T he BN sliding ferroelectric has ultrafast switching speed and high enduran ce\, comparable to state-of-the-art ferroelectric field effect transistors [3]. Besides real space ferroelectricity engineering\, we demonstrate the ability to engineer material band structures in the reciprocal space. Whe n a small twist angle is introduced to the ferroelectric BN bilayer\, the staggered out-of-plane polarizations in twisted BN constitute a moiré ferr oelectric substrate that can modify band structures of the target material which senses the moiré potential [4].\n[1] K. Yasuda et al.\, Science 372 \, 1458–1462 (2021).[2] X. Wang et al.\, Nat. Nano. 17\, 367–371 (2022).\n [3] K. Yasuda et al.\, Science 385\, 53-56 (2024).[4] X. Wang et al.\, arX iv : 2405.03761 (2024). DTSTART;TZID=America/Los_Angeles:20241121T133000 DTEND;TZID=America/Los_Angeles:20241121T143000 LAST-MODIFIED:20241115T150759Z LOCATION:B421 SUMMARY:: Sliding ferroelectricity in stacking engineered van der Waals mat erials TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-11-21/sliding-ferroelectricity- stacking-engineered-van-der-waals-materials END:VEVENT BEGIN:VEVENT UID:8b21b40b-7f64-4493-bc9d-cf46e43ab277 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241115T150707Z DESCRIPTION:Speaker: Zhuquan Zhang\, MIT\n\nUnderstanding and controlling t he interactions between quasiparticles are central to condensed matter res earch. In magnetically ordered systems\, the collective excitations of spi n precessions are spin waves—the quanta of which are magnons. Despite the growing interest in manipulating magnonic states beyond thermodynamic equi librium\, elucidating and inducing coherent couplings between distinct mag non modes remain longstanding challenges. In this talk\, I will discuss ou r recent work on coherent nonlinear magnon-magnon interactions in antiferr omagnets driven by tailored terahertz fields. We have demonstrated a unidi rectional magnon upconversion process and identified correlated magnonic r esponses at both the sum and difference frequencies of the interacting mag non modes. By tuning the difference frequency generation to match the ener gy of the low-frequency magnon mode\, we achieved parametric amplification of magnon coherence. Furthermore\, we reveal magnon self-interactions by increasing the driving fields to excite the magnon mode far from equilibri um. These findings offer valuable insights into coherent magnon-magnon int eractions in antiferromagnets\, advancing the fields of spintronics and ma gnonics into the ultrafast nonlinear regime. DTSTART;TZID=America/Los_Angeles:20241122T140000 DTEND;TZID=America/Los_Angeles:20241122T150000 LAST-MODIFIED:20241115T150707Z LOCATION:B421 SUMMARY:: Nonlinear magnonics in canted antiferromagnets TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-11-22/nonlinear-magnonics-cante d-antiferromagnets END:VEVENT BEGIN:VEVENT UID:55b8240b-9af2-48b4-bc76-a21738e54f12 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241125T024350Z DESCRIPTION:Speaker: Tianle Wang\, UC Berkeley\n\nInteracting electrons in one dimension are often described as Luttinger liquids\, having properties intrinsically different from Fermi liquids in higher dimensions. Luttinge r liquids exhibit exotic quantum phenomena such as scale-invariant correla tion tunable by interaction strength\, but their experimental characteriza tion can be challenging. Our work [1] demonstrates that layer-stacking dom ain walls (DWs) in van der Waals heterostructures form a broadly tunable L uttinger liquid system\, including both isolated and coupled arrays. We us e scanning tunneling microscopy to image the evolution of DW Luttinger liq uids under different interaction regimes. Single DWs at low carrier densit y are highly susceptible to Wigner crystallization\, whereas at intermedia te densities dimerized Wigner crystals form because of an enhanced magneto -elastic coupling. Periodic arrays of DWs exhibit an interplay between int ra- and inter-chain interactions giving rise to new quantum phases: At low electron densities\, dominant inter-chain interactions induce a 2D electr on crystal of phased-locked 1D Wigner crystal in a staggered configuration \; Increased electron density causes intra-chain fluctuation potentials to dominate\, leading to an electronic smectic liquid crystal phase with alg ebraical correlation decay along the chain direction but disordered betwee n chains. Our work shows that layer-stacking DWs in 2D heterostructures pr ovide opportunities to explore Luttinger liquid physics.\n[1] H. Li et. al \, Nature 631\, 765–770 (2024) DTSTART;TZID=America/Los_Angeles:20241126T143000 DTEND;TZID=America/Los_Angeles:20241126T153000 LAST-MODIFIED:20241125T024350Z LOCATION:PAB B421 SUMMARY:: Tunable Luttinger Liquid in van der Waals Heterostructures TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-11-26/tunable-luttinger-liquid- van-der-waals-heterostructures END:VEVENT BEGIN:VEVENT UID:1048bdf7-18d6-4dfd-8955-729400aa2f43 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241201T051221Z DESCRIPTION:Speaker: Xiaohan Wan (University of Michigan)\n\nOne of the gre atest triumphs of condensed matter physics is the understanding of fractio nal quantum Hall effect (FQHE) seen in 2D electron gas under strong magnet ic field. It had been a long standing question if FQHE can be obtained wit hout magnetic field (dubbed as fractional quantum anomalous Hall effect (F QAHE)). The basic ingredients for electronic bands to support lowest-Landa u-level-type FQAHE had been identified by theorists to be: (i) flat isolat ed Chern band with a gap larger than interaction scale\, (ii) ideal quantu m geometry and (iii) uniform Berry curvature -- these type of electronic b ands are called ideal flat bands. However\, it remained elusive in experim ents since realizing these requirements in solid state materials turned ou t to be almost impossible. With the recent advent of moire materials\, suc h as twisted bilayer graphene (TBG) and twisted transition metal dichalcog enides (TMDs)\, where ideal flat bands mimicking lowest Landau level had b een identified\, the excitement toward realization of FQAHE renewed. Indee d\, in the past year FQAHE has been experimentally observed in twisted TMD s. However\, these developments beg the questions: (i) are there other pla tforms to realize lowest Landau-level type of flat bands in moire systems? (ii) can we find flat-bands in moire systems which have properties beyond twisted bilayer graphene/TMDs? (iii) can there be FQAHE beyond FQHE in La ndau levels? In this talk\, I first show that graphene or TMD like K-valle y material or two layers with twist are not essential to realize ideal fla t bands\, it can be achieved in a monolayer Gamma-valley 2D material with a quadratic band crossing point\, by applying moire periodic strain. These flat bands share similarities to those in twisted bilayer graphene\, with the added benefit of a more uniform Berry curvature distribution\, which is crucial for stabilizing FQAHE. Next\, I show that the number of ideal f lat bands in moire systems do not need to be limited to 1 or 2 per valley per spin as in twisted TMD or TBG\, and the maximum number of flat bands i s dictated by the symmetries of the moire system. We systematically classi fy all possible numbers of ideal flat bands with different point group sym metries\, unifying all known examples in monolayer and bilayer systems. In the last part of the talk\, I discuss the possibility of novel many body ground states that can emerge in these flat bands with high degeneracy. Ou r exact diagonalization results show evidence of FQAHE beyond FQHE in LLs\ , whose Hall conductance differs from the filling factor. DTSTART;TZID=America/Los_Angeles:20241204T130000 DTEND;TZID=America/Los_Angeles:20241204T140000 LAST-MODIFIED:20241204T175314Z LOCATION:PAB B421 SUMMARY:: New Pathways to Topological Flat Bands and Novel Fractional Quant um Anomalous Hall States in moire systems TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-12-04/new-pathways-topological- flat-bands-and-novel-fractional-quantum-anomalous-hall END:VEVENT BEGIN:VEVENT UID:32b7e105-f1be-4332-af5a-4d6266f68970 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241127T183054Z DESCRIPTION:Speaker: Ambikesh Gupta (Weizmann Institute)\n\nABC-stacked rho mbohedral graphene multilayers exhibit a wide variety of electronic ground states characterized by broken isospin symmetry and superconductivity. Re cently\, indirect evidence of inter-valley coherent (IVC) order has been r eported in rhombohedral trilayer graphene (RTG) [1]\, with possible implic ations for the origin of superconductivity [2]. In this talk I will presen t our recent work [3] on the first direct visualization of IVC order in RT G using scanning tunneling microscopy and spectroscopy. By tuning the chem ical potential through the van-Hove singularity near the edge of the valen ce band\, we observe a cascade of phase transitions associated with the fo rmation of half- and quarter-metal states. Next\, I will show that IVC pha ses\, distinguished by an enlarged real space unit cell\, are present near both the high- and low-density boundaries of the half-metal phase. I will discuss how we precisely reconstruct the IVC band structure through quasi particle interference. Finally\, I will present evidence of a novel IVC ph ase\, an incommensurate IVC\, that agrees with the recent prediction of an IVC-crystal phase [4]. This incommensurate order originates from the intr insic annular Fermi surface of RTG. It introduces a spontaneously generate d mini-Brillouin zone to the RTG band structure\, in contrast to twisted s ystems where this feature is imposed by the stacking arrangement.\n1. Inte rvalley coherence and intrinsic spin–orbit coupling in rhombohedral trilay er graphene.Nat. Phys. 20\, 1413–1420 (2024)2. Inter-valley coherent order and isospin fluctuation mediated superconductivity in rhombohedraltrilaye r graphene. Nat. Commun. 13\, 6013 (2022)3. Visualizing incommensurate int er-valley coherent states in rhombohedral trilayer graphene.arXiv:2411.111 63 [cond-mat.mes-hall] (2024)4. Incommensurate inter-valley coherent state s in ABC graphene: collective modes andsuperconductivity. arXiv:2408.10309 v1 [cond-mat.str-el] (2024) DTSTART;TZID=America/Los_Angeles:20241209T133000 DTEND;TZID=America/Los_Angeles:20241209T143000 LAST-MODIFIED:20241127T184756Z LOCATION:PAT C-520 SUMMARY:: Visualizing incommensurate inter valley coherent states in rhombo hedral trilayer graphene TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-12-09/visualizing-incommensurat e-inter-valley-coherent-states-rhombohedral-trilayer END:VEVENT BEGIN:VEVENT UID:e41d738d-2e40-40e2-a1a9-ad7821ba224b DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241204T175619Z DTSTART;TZID=America/Los_Angeles:20241212T123000 DTEND;TZID=America/Los_Angeles:20241212T133000 LAST-MODIFIED:20241204T175619Z LOCATION:PAB B421 SUMMARY:: Novel aspects of fractionalization in Chern bands TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-12-12/novel-aspects-fractionali zation-chern-bands END:VEVENT BEGIN:VEVENT UID:2868087e-5f0a-4fde-b41c-402741723f2a DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241213T020733Z DESCRIPTION:Speaker: Mei-Yin Chou\, Academia Sinica\, Taiwan \n\nThe unexpe cted discovery of superconductivity and strong electron correlation in twi sted bilayer graphene\, a system composed solely of s-p electrons\, stands as one of the most intriguing developments in two-dimensional materials i n recent years. A key feature of this system is the emergence of flat ener gy bands near the Fermi level (a condition that promotes the formation of novel many-body phases) at the so-called “magic angles.” Gaining a deeper understanding of the physical origin of these flat bands is essential for constructing an effective theory of unconventional electron correlation. I n this talk\, I will present our recent theory on the origin of these magi c angles in twisted graphene layers and their connection to the Fermi ring in AA-stacked multilayer graphene. DTSTART;TZID=America/Los_Angeles:20241213T140000 DTEND;TZID=America/Los_Angeles:20241213T150000 LAST-MODIFIED:20241213T021351Z LOCATION:B421 SUMMARY:: Moir Physics in Graphene Layers What s the Magic TRANSP:OPAQUE URL:https://phys.washington.edu/events/2024-12-13/moir-physics-graphene-lay ers-what-s-magic END:VEVENT BEGIN:VEVENT UID:7180fd6d-249d-4caa-a269-7c93ab181bb5 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241227T182110Z DESCRIPTION:Speaker: Naiyuan (James) Zhang\, Brown University\n\nExcitons\ , Coulomb-driven bound states of electrons and holes\, are typically compo sed of integer charges. However\, in bilayer systems influenced by charge fractionalization\, a more exotic form of interlayer exciton can emerge\, where pairing occurs between constituents that carry fractional charges. D espite numerous theoretical predictions for such fractional excitons\, the ir experimental observation has remained elusive. Here\, we report transpo rt signatures of excitonic pairing within fractional quantum Hall effect s tates. By probing the composition of these excitons and their impact on th e underlying wavefunction\, we uncover two novel quantum phases of matter. One of these orders can be viewed as the fractional counterpart of the ex citon condensate at a total filling of one\, while the other involves a mo re unusual type of exciton that obeys fermionic and anyonic quantum statis tics\, challenging the standard paradigm of bosonic excitons.  DTSTART;TZID=America/Los_Angeles:20250114T123000 DTEND;TZID=America/Los_Angeles:20250115T000000 LAST-MODIFIED:20250614T002311Z LOCATION:B421 SUMMARY:: Excitons in the Fractional Quantum Hall Effect TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-01-14/excitons-fractional-quant um-hall-effect END:VEVENT BEGIN:VEVENT UID:f3d3c79f-17bd-4221-a409-04b12dc9369b DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250123T013056Z DESCRIPTION:Speaker: Tessa Cookmeyer\, UCSB/KITP\n\nA “spin liquid” is a no vel phase of matter where the spins fail to order in the ground-state/low- temperature phase. The Kitaev spin liquid is one such example arising from an exactly solvable honeycomb lattice Hamiltonian with direction-dependen t Ising interactions. Remarkably\, not long after\, it was demonstrated th at the Kitaev model may be realized in certain compounds\, and thus the se arch for a Kitaev spin-liquid material began. Due to the exact solubility\ , many experiments are compared directly to the Kitaev model despite other competing interactions in the effective spin Hamiltonian. To overcome thi s issue\, we introduce a technique that can provide approximate results on Hamiltonians within the Kitaev phase allowing us to predict the outcome o f e.g. inelastic neutron scattering experiments on realistic Kitaev spin l iquid candidates. I will additionally discuss my proposal to engineer a sm all-system analog of a Kitaev spin liquid in a quantum simulator as a cont rolled platform to explore such physics.\nZoom recording DTSTART;TZID=America/Los_Angeles:20250206T123000 DTEND;TZID=America/Los_Angeles:20250206T133000 LAST-MODIFIED:20250206T223639Z LOCATION:PAT C520 SUMMARY:: The search for a Kitaev spin liquid predicting experiments and en gineering its realization TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-02-06/search-kitaev-spin-liquid -predicting-experiments-and-engineering-its-realization END:VEVENT BEGIN:VEVENT UID:ce610d5b-8d63-4f1f-b561-3ef94598ee9d DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250207T212247Z DESCRIPTION:Speaker: Makoto Kohda\, Tohoku University\n\nPersistent Spin He lix State in III-V and Layered Semiconductors\nWaves possess distinctive p roperties\, including diffraction and interference\, which differentiate t hem from the particle nature of electrons currently utilized for binary an d sequential data processing and storage. In the solid state\, wave proper ties manifest in electron spin waves in semiconductors or magnons in magne tic materials. From this perspective\, we undertake a detailed examination of how electron spin waves and magnons can be employed as information car riers for processing and storage\, ultimately leading to the emergence of 'spin-based wave-parallel computing DTSTART;TZID=America/Los_Angeles:20250225T150000 DTEND;TZID=America/Los_Angeles:20250226T000000 LAST-MODIFIED:20250207T212247Z LOCATION:PAT C-520 SUMMARY:: Game Changer in Semiconductor Industry Parallel Wave Information Processing and Transport TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-02-25/game-changer-semiconducto r-industry-parallel-wave-information-processing-and END:VEVENT BEGIN:VEVENT UID:d68fbe23-5fda-4e34-8da9-8789c6af0d09 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250326T011635Z DESCRIPTION:Speaker: Yaodong Li\, Stanford university\n\nStudies of quantu m dynamics have traditionally focused on unitary evolution\, where isolate d systems evolve according to the Schrödinger equation. In contrast\, meas urements were often treated as a secondary consideration—an unpredictable and disruptive intervention. Recent experimental progress in building prog rammable quantum platforms has made it possible for measurements to act as an active force in driving quantum dynamics and shaping quantum states\, opening new frontiers in far-from-equilibrium many-body physics. In this t alk\, I will provide an overview of theoretical work exploring the interpl ay between unitary evolution and quantum measurements and how this interpl ay gives rise to new emergent phenomena\, including a novel dynamical phas e transition in quantum entanglement. I will then describe our recent expe rimental observation of the phase transition using superconducting qubits\ , achieved through a new protocol that circumvents the need for post-selec tion. I will conclude by discussing how these findings have extended our u nderstanding of quantum many-body systems (both in and out of equilibrium) \, as well as their implications for the practice of quantum computing.\n \nZoom link DTSTART;TZID=America/Los_Angeles:20250327T123000 DTEND;TZID=America/Los_Angeles:20250327T133000 LAST-MODIFIED:20250614T002257Z LOCATION:PAB B421 SUMMARY:: Taking the measure of quantum dynamics TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-03-27/taking-measure-quantum-dy namics END:VEVENT BEGIN:VEVENT UID:fe8e3df2-b802-4b7e-ac0f-18560f09cbd9 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250414T193520Z DESCRIPTION:Speaker: Zhanybek Alpichshev\, Austria Institute of Science and Technology\n\nThe advancement of high-speed data processing and signal ma nipulation technologies has pushed the frontier into the terahertz (THz) f requency range\, raising a fundamental challenge: how to efficiently contr ol electromagnetic fields at these frequencies. This issue\, often referre d to as the 'THz gap' in optical and electronic engineering\, remains a ma jor obstacle to practical applications. A promising strategy is to manipul ate THz electromagnetic waves through polaritons—hybrid light-matter excit ations—that harness the intrinsic nonlinear response of matter. In this t alk\, I will introduce Quantum Paraelectric (QP) solids as a novel platfor m for THz phonon-polaritonics\, leveraging the extreme nonlinearity of SrT iO₃ in its QP phase\, which arises due to its proximity to the incipient f erroelectric state. This strong nonlinearity enables efficient self- and c ross-coupling between polaritons\, paving the way for all-optical\, field- programmable THz polariton circuits. In the second part of the talk\, I w ill turn to the basic problem of linear propagation of THz electromagnetic waves in SrTiO₃ and KTaO₃. As it turns out\, our experimental data challe nges long-held assumptions about light propagation in dispersive dielectri cs—an area considered settled since the foundational works of Lorentz\, So mmerfeld\, and Brillouin — bringing a fresh perspective on a fundamental p roblem in wave physics. DTSTART;TZID=America/Los_Angeles:20250422T160000 DTEND;TZID=America/Los_Angeles:20250422T170000 LAST-MODIFIED:20250414T193520Z LOCATION:PAB B421 SUMMARY:: Tracing light on Linear and Nonlinear Terahertz Polaritonics in Q uantum Paraelectrics TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-04-22/tracing-light-linear-and- nonlinear-terahertz-polaritonics-quantum-paraelectrics END:VEVENT BEGIN:VEVENT UID:fb168abf-07a5-4d60-84f8-baf1b95bf93f DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250429T173131Z DESCRIPTION:Speaker: Magnus Lykkegaard\, Niels Bohr Institute\, University of Copenhagen\n\nJosephson junctions with two superconducting leads are th e key component in superconducting quantum devices. In multi-terminal Jose phson setups\, the phase differences between superconducting leads play a role similar to momenta (quasi-momenta)\, enabling us to phase-engineer ba ndstructures formed by Andreev bound states\, and control the resulting to pology.  By tuning the phase-differences without applying a magnetic field \, one can control interference effects while keeping time-reversal symmet ry intact in the junction. Interestingly\, a chain of Josephson junctions connected via quantum dots behave like a single multi-terminal junction\, highlighting a surprising link between different device architectures\, an d paves the way for easier control and fabrication. DTSTART;TZID=America/Los_Angeles:20250501T123000 DTEND;TZID=America/Los_Angeles:20250501T133000 LAST-MODIFIED:20250429T173131Z LOCATION:PAB B421 SUMMARY:: Josephson matter with phase engineered topology TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-05-01/josephson-matter-phase-en gineered-topology END:VEVENT BEGIN:VEVENT UID:543513d4-2d75-472c-912b-a1e9ac18aed0 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250815T013549Z DESCRIPTION:Speaker: Jacob Steiner\, Caltech\n\nCurrent-biased Josephson ju nctions exhibit hysteretic transitions between dissipative and superconduc ting states as characterized by switching and retrapping currents. We deve lop a phenomenological theory of nonreciprocal switching and retrapping in underdamped junctions within the resistively and capacitively shunted jun ction (RCSJ) model. We find that while the diodelike behavior of switching currents is rooted in asymmetric current-phase relations (requiring broke n time-reversal symmetry)\, nonreciprocal retrapping currents originate in asymmetric quasiparticle currents (requiring broken particle-hole symmetr y). These distinct symmetry requirements explain the observation of nonrec iprocal retrapping in Josephson junctions that involve a single magnetic a tom\, where Yu–Shiba–Rusinov (YSR) states break particle-hole symmetry at subgap energies. Going beyond phenomenology\, we show how  nonreciprocity in the RCSJ model arises from a microscopic description. Essentially\, the YSR states contribute significantly to the damping when the transparency of the junction is relatively large\, necessitating a calculation to all o rders in the tunneling amplitude. Within an adiabatic approximation\, the damping reduces to the quasiparticle current evaluated at the instantaneou s junction voltage—thereby inheriting YSR-induced particle–hole asymmetrie s in the density of states and capturing higher-order processes such as mu ltiple Andreev reflections. Finally\, we show that the accompanying fluctu ations obey a generalized (nonlinear) fluctuation–dissipation relation pro vided temperatures are sufficiently large.  DTSTART;TZID=America/Los_Angeles:20250821T123000 DTEND;TZID=America/Los_Angeles:20250821T133000 LAST-MODIFIED:20250815T175026Z LOCATION:B421 SUMMARY:: Dissipation induced diode effects in current biased Josephson jun ctions TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-08-21/dissipation-induced-diode -effects-current-biased-josephson-junctions END:VEVENT BEGIN:VEVENT UID:c605689c-b803-4210-81f6-f6b5ef24c87d DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251101T001329Z DESCRIPTION:Speaker: Ying Ran\, Boston College\n\nFractional quantum anomal ous Hall states have been experimentally discovered recently. Understandin g these phases of matter microscopically remains a theoretical challenge. I will show that all the composite fermion states in these systems can be compactly represented as the hyperdeterminant wavefunctions – a direct gen eralization of the Slater determinant wavefunctions to tensors. These hype rdeterminants are generalizations of the conventional fermionic parton con structions previously applied in the context of fractional quantum Hall st ates and quantum spin liquids. Practical simulation methods for hyperdeter minants will be discussed. DTSTART;TZID=America/Los_Angeles:20251113T123000 DTEND;TZID=America/Los_Angeles:20251113T133000 LAST-MODIFIED:20251101T001329Z LOCATION:PAB B421 SUMMARY:: Hyperdeterminant wavefunctions nbsp TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-11-13/hyperdeterminant-wavefunc tions-nbsp END:VEVENT BEGIN:VEVENT UID:8be033d4-83fc-472b-af73-3cf3273b35ee DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251101T001821Z DESCRIPTION:Speaker: Matan Uzan\, Weizmann Institute\n\nFlat-band graphene heterostructures host a diverse repertoire of correlated and topological p hases\, yet controlling them and representing them with predictive\, quant itatively accurate models remains a major challenge. This talk traces the evolution from calibrated theory to insight\, emphasizing phenomenological \, data-constrained modeling for interpreting new measurements. I’ll begin with our development of local de Haas–van Alphen spectroscopy using scann ing SQUID-on-tip (SOT) magnetometry\, which maps thermodynamic quantum osc illations with sub-micron resolution. Starting from relatively simple devi ces (Bernal bilayer\, ABA trilayer)\, I’ll show how these benchmarks - tog ether with calibrated tight-binding/continuum models - establish a single- particle baseline and guide next-generation moiré samples. I’ll then turn to rhombohedral pentalayer graphene aligned to hBN (R5LG/hBN)\, where refi ned theory including sublattice-asymmetric tunneling and lattice relaxatio n explains striking orientation-dependent transport and SOT signatures. Th e central message is that hBN alignment orientation - a previously overloo ked binary structural degree of freedom - reorganizes miniband isolation a nd the hierarchy of symmetry-broken phases. Finally\, I’ll present a two-ξ device geometry that flips the alignment within one stack\, enabling orie ntation-resolved tests and a reproducible protocol applicable to hBN-align ed graphite multilayers and twisted graphene multilayers. DTSTART;TZID=America/Los_Angeles:20251114T123000 DTEND;TZID=America/Los_Angeles:20251114T133000 LAST-MODIFIED:20251101T001825Z LOCATION:PAB B421 SUMMARY:: Unveiling the role of hBN alignment orientation in moir rhombohed ral graphene TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-11-14/unveiling-role-hbn-alignm ent-orientation-moir-rhombohedral-graphene END:VEVENT BEGIN:VEVENT UID:21bd06cf-80c3-411f-8b20-d54af07d416c DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251113T185302Z DESCRIPTION:Speaker: Josephine Yu\, Stanford\n\nThis talk will highlight th e results of arXiv:2509.25322. In a Fermi liquid\, the shot noise signatur e reveals which scattering mechanism — electron-electron or electron-impur ity — dominantly impedes charge motion and is thereby a window into the mi croscopic physics of an electronic system. However\, the understanding of shot noise in strongly correlated phases\, for which a quasiparticle pictu re may not be justified\, is far less advanced. In this talk\, I will shar e recent progress on this problem for a certain class of strongly-correlat ed systems. In particular\, I will present a theory of the non-equilibrium current response for metallic systems near quantum critical points where electronic quasiparticles fractionalize\, such as systems near continuous metal-insulator transitions. I will sketch the derivation of a non-perturb ative current noise composition law\, wherein the total noise is the sum o f the noise of each fractionalized constituent (bosonic holons and fermion ic spinons)\, weighted by their respective resistivities. This composition rule can be interpreted in terms of a simple analogy with resistors in se ries. Lastly\, I will present an example of how quantum criticality can co llude with fractionalization to suppress the measured shot noise in suffic iently long nanowires.Zoom recording DTSTART;TZID=America/Los_Angeles:20251118T123000 DTEND;TZID=America/Los_Angeles:20251118T133000 LAST-MODIFIED:20251118T225339Z LOCATION:PAB B421 SUMMARY:: The sound of electrons shattering can be rather quiet TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-11-18/sound-electrons-shatterin g-can-be-rather-quiet END:VEVENT BEGIN:VEVENT UID:ab4aed6c-9fe3-4e5e-83a3-387324b4b0a7 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251115T190703Z DESCRIPTION:Speaker: Santos\, Luiz Henrique\, Emory University \n\nThe expe rimental discovery of fractional Chern insulators (FCIs) in moiré material s marks a significant development in the study of highly entangled quantum materials. FCIs differ from the traditional fractional quantum Hall effec t not only because they occur without external magnetic fields but also be cause of essential lattice effects that give rise to topologically non-tri vial moiré bands. Despite these differences\, the sequence of FCIs observe d in moiré transition metal dichalcogenides and multi-layer graphene align s with the hierarchy of Jain states found in the conventional FQH system\, which can be interpreted in terms of composite fermions. Motivated by the se experimental results\, in this talk\, we will present an analysis of co mposite fermions that provides a roadmap to understanding Abelian FCIs in twisted bilayer MoTe2. The interplay between the moiré periodic potentials and the Chern-Simons gauge field gives rise to a fractal Hofstadter spect rum of composite fermions characterized a complex structure of incompressi ble states and topological bands. Among these\, we identify both FCIs cons istent with the Jain hierarchy and new classes of FCIs whose transport pro perties differ from those of the Jain sequence. We also discuss the influe nce of the displacement field\, suppressing composite fermion gaps and ind ucing topological phase transitions. DTSTART;TZID=America/Los_Angeles:20251120T123000 DTEND;TZID=America/Los_Angeles:20251120T133000 LAST-MODIFIED:20251120T185820Z LOCATION:PAB B421 SUMMARY:: Electron fractionalization without magnetic fields characterizing composite fermions in twisted bilayer MoTe2 TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-11-20/electron-fractionalizatio n-without-magnetic-fields-characterizing-composite END:VEVENT BEGIN:VEVENT UID:ad1c1eca-67ae-40e7-b1db-1e8d36b5905b DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251115T182120Z DESCRIPTION:Speaker: Evgeny Redekop\, UC Santa Barbara\n\nUnderstanding eme rgent electronic phases in low-dimensional materials requires experimental tools capable of probing local electromagnetic properties with nanometer resolution and high sensitivity. The nanoSQUID-on-tip (nSOT) is a scanning superconducting quantum interference device fabricated directly on the ap ex of a pulled quartz tip\, enabling quantitative multimodal imaging at th e nanoscale and cryogenic temperatures. In this talk\, I will outline the nSOT’s working principle\, fabrication\, and readout schemes\, emphasizing its versatility as a probe of correlated quantum states. I will present t wo recent applications: imaging fractional Chern insulators in twisted MoT e₂ and a new approach to mapping transport regimes in dual-gated Bernal bi layer graphene. I will also highlight emerging directions that extend the nSOT’s capabilities\, demonstrating its potential as a universal platform for exploring quantum matter and mesoscopic electrodynamics.Zoom recording DTSTART;TZID=America/Los_Angeles:20251121T123000 DTEND;TZID=America/Los_Angeles:20251121T133000 LAST-MODIFIED:20251121T230030Z LOCATION:PAB B421 SUMMARY:: Imaging Quantum and Mesoscopic Phenomena with NanoSQUID on Tip Mi croscopy TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-11-21/imaging-quantum-and-mesos copic-phenomena-nanosquid-tip-microscopy END:VEVENT BEGIN:VEVENT UID:26605699-e228-4fbe-beb5-0468dcfed30b DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251117T230411Z DESCRIPTION:Speaker: Brandon Iritani\, Columbia University\n\nThe straightf orward molecular structure\, insensitivity to external fields\, and existe nce of narrow optical transitions in Sr2 make it an attractive platform fo r a molecular clock. Additionally\, it possesses an array of clock transit ions in the elusive THz frequency range and offers the capability to perfo rm precise tests of quantum chemistry. Previously\, we characterized the t otal fractional systematic uncertainty for a vibrational transition in 88S r₂ to less than 5×10⁻¹⁴. Looking ahead\, we plan to utilize a novel techni que to constrain gravity-like Yukawa forces by comparing molecular isotope shift measurements to state-of-the-art quantum chemistry calculations. Th is approach relies on the existence of several bosonic Sr isotopes and on a ground-state molecular energy structure that is feasible\, though challe nging\, to describe theoretically.  In this talk\, I will discuss our prog ress toward producing 86Sr₂ at ultracold temperatures\, including efforts to address isotope shifts for cooling and trapping atoms\, as well as phot oassociating the molecules. Additionally\, I will introduce a next-generat ion molecular clock apparatus designed to overcome factors currently limit ing our precision.Slides DTSTART;TZID=America/Los_Angeles:20251124T113000 DTEND;TZID=America/Los_Angeles:20251124T123000 LAST-MODIFIED:20251126T003414Z LOCATION:PAB B421 SUMMARY:: Progress toward an isotope shift measurement with a strontium mol ecular lattice clock TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-11-24/progress-toward-isotope-s hift-measurement-strontium-molecular-lattice-clock END:VEVENT BEGIN:VEVENT UID:cb1b22ef-8ef0-4ab8-9675-97e8afdbe70d DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251117T224502Z DESCRIPTION:Speaker: Kaan Alp Yay\, Stanford University\n\nThe mechanism of unconventional superconductivity in iron-based superconductors and its re lationship to other ordered phases remain open questions. One of these pha ses\, electronic nematic order\, arises when correlated electrons spontane ously break the rotational symmetry of a crystal lattice. When electronic nematic order couples bilinearly to symmetry-breaking lattice strain\, bot h appear together at a single ferroelastic phase transition\, producing st ructural twin domains with distinct orientations of the nematic director. While the effects of externally induced strain on these domains are well e stablished\, the intrinsic behavior of spontaneous subdomain strain fields has remained unexplored. In this talk\, I will present our discovery of s pontaneous mesoscopic strain waves within individual nematic domains of an iron-based superconductor\, observed using dark-field X-ray microscopy (D FXM). Using this novel full-field\, bulk-sensitive imaging technique\, we visualize subdomain strain modulations emerging concurrently with nematic order. Elastic compatibility relations governing inhomogeneous strains pro vide a natural mechanism for the strain waves. Our findings reveal a broad ly relevant form of strain self-organization and position DFXM as a powerf ul probe of the local interplay between lattice strain and electronic orde r.Zoom recording DTSTART;TZID=America/Los_Angeles:20251202T153000 DTEND;TZID=America/Los_Angeles:20251202T163000 LAST-MODIFIED:20251203T021808Z LOCATION:PAB B421 SUMMARY:: Discovery of spontaneous mesoscopic strain waves in nematic domai ns using dark field X ray microscopy TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-12-02/discovery-spontaneous-mes oscopic-strain-waves-nematic-domains-using-dark-field-x END:VEVENT BEGIN:VEVENT UID:57bc7630-fafe-4134-b510-b3f99dde70f6 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251117T055132Z DESCRIPTION:Speaker: Tianchuang (Michael) Luo\, MIT\n\nExquisite control of complex systems including atoms\, molecules\, and crystal lattices is a r ecurring theme across the natural sciences. In solids\, ultrafast light ha s emerged as a powerful tool to access hidden phases with exceptional spee ds. Yet in most cases\, photoinduced phases collapse back to equilibrium o nce the drive is removed\, limiting their utility. Here I introduce a path way to stabilize and control light‑induced phases by harnessing critical f luctuations. Using strong-field THz excitation in the van der Waals antife rromagnet FePS₃\, I generate a metastable magnetized state inaccessible in equilibrium via nonlinear driving of magnon-phonon hybrids. The lifetime of the metastable magnetization diverges around the Néel temperature\, rea ching an experimental maximum of 2.5 milliseconds. By extracting the criti cal exponents governing the metastable magnetization amplitude and relaxat ion time\, we develop a comprehensive picture of how fluctuations stabiliz e the metastable order. More strikingly\, I demonstrate coherent tunabilit y of the magnetized state: by controlling the phase of coherent phonon osc illation\, I achieve on-demand\, bidirectional magnetic switching. These r esults establish fluctuation‑enabled\, ultrafast control of hidden magneti c phases via dynamical spin–lattice interactions\, opening routes to next‑ generation magnetic devices.Zoom recording DTSTART;TZID=America/Los_Angeles:20251204T123000 DTEND;TZID=America/Los_Angeles:20251204T133000 LAST-MODIFIED:20251205T010841Z SUMMARY:: Ultrafast Control of Hidden Magnetic Phases by Shaping Fluctuatio ns TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-12-04/ultrafast-control-hidden- magnetic-phases-shaping-fluctuations END:VEVENT BEGIN:VEVENT UID:da1e5837-0ec6-4a79-89fd-c14e03b6981b DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251119T031158Z DESCRIPTION:Speaker: Junkai Dong\, Harvard University\n\nRecent advances in 2D materials with Berry curvature such as rhombohedral graphene have insp ired extensions of Wigner crystals. I will introduce the anomalous Hall cr ystal (AHC)\, a phase that spontaneously breaks continuous translation sym metry but has a nonzero Chern number. I will propose the λ−jellium model\, an extension of the two-dimensional jellium model\, as a minimal model fo r the AHC. I will analyze low-energy phonons of the AHC through its elasti city theory in both rhombohedral graphene and λ−jellium. Unlike the always -triangular Wigner crystal\, the AHC can prefer many lattice shapes. Furth ermore\, its elasticity theory can contain terms such as a previously over looked 'kineo-elastic' term that leads to dramatic differences in phonon s peeds in opposite directions.Zoom recording DTSTART;TZID=America/Los_Angeles:20251205T123000 DTEND;TZID=America/Los_Angeles:20251205T133000 LAST-MODIFIED:20251218T214934Z LOCATION:PAB B421 SUMMARY:: Anomalous Hall Crystals and their Phonons TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-12-05/anomalous-hall-crystals-a nd-their-phonons END:VEVENT BEGIN:VEVENT UID:5c210c60-f0bc-4a7d-aa25-2b342dba0fa7 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251117T221835Z DESCRIPTION:Speaker: Jiewen Xiao\, Weizmann Institute\n\nMapping the energy –momentum dispersion of quantum materials is essential for understanding t heir strongly correlated electronic phenomena. I will introduce a new type of scanning probe microscope—the Quantum Twisting Microscope (QTM)—which enables direct momentum-space imaging of electrons\, in close analogy to h ow a scanning tunneling microscope (STM) probes electronic states in real space. The QTM is based on a van-der-Waals (vdW) heterostructure on a tip\ , which\, when brought into contact with another vdW sample\, allows elect rons to tunnel quantum coherently. This configuration turns the tip into a scanning electronic interferometer. By adding a controllable twist degree of freedom between tip and sample\, QTM becomes a local\, momentum-resolv ing scanning probe. In the first part of the talk\, I will show how the QT M can directly image phonon modes in twisted bilayer graphene\, providing momentum- and mode-resolved access to electron–phonon coupling. In the sec ond part\, I will present the first momentum-space image of the strongly i nteracting energy bands of magic-angle twisted bilayer graphene (MATBG)\, offering a direct visualization of its underlying correlated electronic st ructure.Zoom recording DTSTART;TZID=America/Los_Angeles:20251208T110000 DTEND;TZID=America/Los_Angeles:20251208T120000 LAST-MODIFIED:20251208T210701Z LOCATION:Zoom SUMMARY:: The Quantum Twisting Microscope Image quantum matter in momentum space TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-12-08/quantum-twisting-microsco pe-image-quantum-matter-momentum-space END:VEVENT BEGIN:VEVENT UID:fb577c8c-8507-4309-adb3-e1749cab276d DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251123T201527Z DESCRIPTION:Speaker: Marcus Bintz\, Harvard University\n\nIf you pull an at om's electron far (~100 nm) from its nucleus\, you will get a large electr ic dipole. In this talk\, I will discuss what happens if you do this to 10 0+ atoms trapped in an optical tweezer array\, where the dipole-dipole int eractions manifest as a long-range spin-1/2 XY model.  Focusing on the man y-body ground state\, I will argue from numerical calculations (iDMRG) tha t this dipolar XY model can naturally yield a gapless Dirac spin liquid.   This is a quantum critical phase of matter representing a strongly-interac ting\, (2+1)-dimensional version of relativistic quantum electrodynamics w ith emergent fermions.  I will then present recent results from Rydberg ar ray experiments in Antoine Browaeys’ group where we attempt to prepare and characterize this spin liquid.Zoom link DTSTART;TZID=America/Los_Angeles:20251209T123000 DTEND;TZID=America/Los_Angeles:20251209T133000 LAST-MODIFIED:20251209T172257Z LOCATION:PAB B421 SUMMARY:: Dipolar Rydberg atoms and the Dirac spin liquid TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-12-09/dipolar-rydberg-atoms-and -dirac-spin-liquid END:VEVENT BEGIN:VEVENT UID:f8e9956b-60b1-4cf9-a07b-233aad333662 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251123T185301Z DESCRIPTION:Speaker: Jerome Lloyd\, University of Geneva\n\nPreparation of thermal and ground states of many-body systems is a central challenge for quantum processors\, needed e.g. as the starting point for many quantum ph ysics experiments or for quantum chemistry applications. In this talk\, I will discuss recent work on efficient state preparation using engineered s ystem-bath physics. First\, I will overview results from the Google experi ment [Science 383 6689 2024]\, where a version of the dissipative algorith m was used to prepare low-energy states of quantum magnetic systems. I wil l then explain how to modify the algorithm to accurately prepare thermal a nd ground states [arXiv:2506.21318 & PRX Quantum 6\, 010361 2025]: the res ulting algorithm is suitable for near-term quantum devices\, and exhibits partial robustness to noise owing to the dissipative nature. We demonstrat e its efficiency numerically for ground states of 1d chain and ladder syst ems\, and thermal states of the 2D quantum Ising model\, providing perturb ative arguments for its more general validity. Zoom recording DTSTART;TZID=America/Los_Angeles:20251211T103000 DTEND;TZID=America/Los_Angeles:20251211T113000 LAST-MODIFIED:20251214T185809Z LOCATION:Virtual (Zoom link in abstract) SUMMARY:: Cooling algorithms for quantum many body state preparation TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-12-11/cooling-algorithms-quantu m-many-body-state-preparation END:VEVENT BEGIN:VEVENT UID:b4fe5cd4-32db-4680-bc55-0c4c687d1b1c DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251203T223744Z DESCRIPTION:Speaker: Peter Krogstrup\, Niels Bohr Institute\n\nThe Novo Nor disk Foundation Quantum Computing Programme (NQCP) and Quantum Foundry Cop enhagen (QFC) are on a mission to develop utility scale quantum computing for life sciences. Through the NQCP pathfinder framework\, various interdi sciplinary teams collaborate closely on mission-driven and data-centric pi lot lines\, spanning from the overarching algorithmic targets to circuit o ptimization down the intricate details of hardware metrics and enabling te chnologies. This presentation will give examples of different ambitious pi lot lines and evaluate the advantages and disadvantages of different hardw are platforms. DTSTART;TZID=America/Los_Angeles:20251211T123000 DTEND;TZID=America/Los_Angeles:20251211T133000 LAST-MODIFIED:20251203T223744Z LOCATION:PAT C520 SUMMARY:: Finding a hardware path to quantum computing for life sciences TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-12-11/finding-hardware-path-qua ntum-computing-life-sciences END:VEVENT BEGIN:VEVENT UID:e6aad590-835e-4b9c-92e7-30c4b3347f1d DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251201T234816Z DESCRIPTION:Speaker: Yen-Chen Tsui\, Princeton University\n\nDirect visuali zation and spectroscopic characterization of electrons’ wavefunctions have been the central interest of understanding the many-body states when elec trons are strongly interacting with each other. By using the scanning tunn eling microscopy/spectroscopy (STM/STS)\, one can achieve such tasks and s tudy quantum materials with high spatial and energy resolution. Two-dimens ional van der Waals heterostructure provides a great platform to explore e xotic many-body states and study emergent phenomena. In this presentation\ , I will first show local spectroscopic studies on fractional quantum Hall states (FQHs) [1] and discuss the implications of fractionalization of el ectrons. In the second part\, we demonstrate directly imaging the field-in duced Wigner crystal [2] and the melting transition of these electron crys tals as a function of electron densities. Interestingly\, the crystal can melt into a FQH liquid and re-enter the crystalline phase. We will also di scuss various types of Wigner crystals that emerge in the zeroth Landau le vel. In the last part of the presentation\, I will present spectroscopic a nd imaging studies of strongly interacting Hofstadter’s states when subjec ted to a moiré potential by hBN alignment. We will analyze the symmetry br eaking patterns of these topological states and visualize their melting tr ansitions. Our work opens the door to examine a wide range of spatially mo dulated electronic phases with strong electron-electron interaction\, as w ell as the visualization of fractionalized quasi-particles.[1] Hu\, Yuwen\ , et al. 'High-resolution tunneling spectroscopy of fractional quantum Hal l states.' Nature Physics 21\, 716–723 (2025)[2] Tsui\, Yen-Chen\, et al. 'Direct observation of a magnetic-field-induced Wigner crystal.' Nature 62 8.8007 (2024): 287-292.Zoom recording DTSTART;TZID=America/Los_Angeles:20251215T123000 DTEND;TZID=America/Los_Angeles:20251215T133000 LAST-MODIFIED:20251218T192111Z LOCATION:PAB B421 SUMMARY:: Visualization and spectroscopic study of strongly interacting ele ctrons in Bernal stacked bilayer graphene at high magnetic fields TRANSP:OPAQUE URL:https://phys.washington.edu/events/2025-12-15/visualization-and-spectro scopic-study-strongly-interacting-electrons-bernal END:VEVENT BEGIN:VEVENT UID:b3951e13-16c7-4a9c-abcd-db30386a79ac DTSTAMP:20260825T131105Z CATEGORIES:Conferences\, Workshops CLASS:PUBLIC CREATED:20260106T063530Z DESCRIPTION:Speaker: 16 speakers\n\nSee the workshop web page for schedule and more details. Registration is open and free! DTSTART;TZID=America/Los_Angeles:20260115T090000 DTEND;TZID=America/Los_Angeles:20260117T170000 LAST-MODIFIED:20260114T182357Z LOCATION:Alder Auditorium and Commons SUMMARY:: TIQM Winter Workshop 2026 Recent Advances in Open Quantum Systems TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-01-15/tiqm-winter-workshop-2026 -recent-advances-open-quantum-systems END:VEVENT BEGIN:VEVENT UID:01b4958e-e002-4e61-bd98-c57375b72583 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260130T180609Z DESCRIPTION:Speaker: Joyce Kwan\, CU Boulder\n\nThe Pfaffian (Moore-Read) w avefunction\, proposed to describe the \nu = 5/2 fractional quantum Hall s tate\, encodes a paired p-wave superfluid and hosts non-Abelian anyons rel evant for topological quantum computation. We report the realization of a three-particle Pfaffian quantum Hall state of ultracold bosons. Using the single-atom control of our quantum simulator\, we engineer and probe the s tate via a machine-learning–optimized ramp that connects a simple initial state to the Pfaffian. The resulting low-temperature state reveals the cha racteristic pairing physics of the Pfaffian wavefunction\, establishing a controlled route toward synthetic fractional quantum Hall states in atomic platforms. DTSTART;TZID=America/Los_Angeles:20260205T123000 DTEND;TZID=America/Los_Angeles:20260205T133000 LAST-MODIFIED:20260202T003311Z LOCATION:PAB C520 SUMMARY:: Realization of a Pfaffian quantum Hall state with ultracold boson s nbsp TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-02-05/realization-pfaffian-quan tum-hall-state-ultracold-bosons-nbsp END:VEVENT BEGIN:VEVENT UID:68565808-d8f0-4ef8-b9a1-7784ac025770 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260205T202243Z DESCRIPTION:Speaker: Aharon Kapitulnik\, Stanford University\n\nA particula rly exciting direction within the emerging realm of `Quantum Materials' fo cuses on  the emergence of novel electronic structure that emphasize gyrot ropic effects. In this talk I will focus on the fundamentals of gyrotropy in quantum materials\, emphasizing optical detection\, manipulation and co ntrol of such effects. We consider both\, time-reversal-symmetry breaking gyrotropic effects\, as well as gyrotropy that originates from natural opt ical activity.  DTSTART;TZID=America/Los_Angeles:20260212T113000 DTEND;TZID=America/Los_Angeles:20260212T123000 LAST-MODIFIED:20260205T202243Z LOCATION:PAT C520 SUMMARY:: Optical studies of gyrotropic quantum materials TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-02-12/optical-studies-gyrotropi c-quantum-materials END:VEVENT BEGIN:VEVENT UID:23cd3323-7206-4a41-bc37-8e8848a91800 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260203T184238Z DESCRIPTION:Speaker: Yifei Bai\, UC Santa Barbara\n\nNonequilibrium quantum dynamics\, such as those in irradiated quantum matter\, continue to hold surprises despite decades of significant theoretical and experimental adva nces. In this talk\, I will present our series of results on the nonequili brium control and engineering of quantum phases using strontium condensate s in a strongly driven incommensurate optical lattice. These results inclu de coherently tunable localization phase transitions\, interlaced phase di agrams\, and Floquet engineering of novel multifractal phases\, all contro lled by light of variable polarization\, even in 1D. We will connect the i mplications of our findings to the mapping between our 1D system and the 2 D irradiated Harper model. Time permitting\, I will also discuss our recen t experiments in lattice-based atom interferometry and observations of str ong-field stabilization.  DTSTART;TZID=America/Los_Angeles:20260217T123000 DTEND;TZID=America/Los_Angeles:20260218T000000 LAST-MODIFIED:20260203T184408Z LOCATION:PAB B421 SUMMARY:: Non equilibrium phases in driven quasicrystals nbsp TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-02-17/non-equilibrium-phases-dr iven-quasicrystals-nbsp END:VEVENT BEGIN:VEVENT UID:1343373f-5f23-48fd-9ee3-b8022c4e0da7 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260128T185008Z DESCRIPTION:Speaker: Kirk Madison\, University of British Columbia\n\nAs ri gorously proven by Paul Busch in 2007\, quantum systems are necessarily di sturbed by measurement [arXiv:0706.3526].  The amount of disturbance\, int erpreted here as state change\, is related to the information gained\, hen ce a measurement scheme that induces no state change yields no new informa tion. Standard projective measurements\, such as the measurement of an exc ited state energy (with respect to the groundstate) by coupling a quantum system to a photon and then detecting the photon absorption\, are maximall y disruptive since they project the initial state of the system into an ei genstate of the measured observable.  By contrast\, so-called weak measure ments provide an observer with little information and\, in turn\, disrupt the quantum state very little.  Also\, known as 'unsharp'\, 'fuzzy' or 'ge ntle'\, such measurements have been considered in the context of measuring the quantum trajectory of a system using weak continuous measurements [Re v. Mod. Phys. 82\, 1155 (2010)]. One scheme for implementing unsharp measu rements is to first entangle a target quantum system with an ancillary qua ntum system and then carry out a measurement on the ancilla.  By adjusting the degree of entanglement\, the sharpness of the measurement on the targ et system can be controlled. In this talk\, we explore how tunable positio n-entangled quantum states of atoms can be used to realize tunable quantum measurements.  Entangled states of atomic pairs are created by Feshbach r esonance coupling and measurements of the ancilla are conducted either by ancilla selective scattering of single photons or by hard collisional loca lization of the ancilla by the scattering of room-temperature atoms in the background vapor of the apparatus.  DTSTART;TZID=America/Los_Angeles:20260219T123000 DTEND;TZID=America/Los_Angeles:20260220T000000 LAST-MODIFIED:20260212T011039Z LOCATION:PAT C520 SUMMARY:: Tuning the sharpness of quantum measurements using position entan gled atomic states TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-02-19/tuning-sharpness-quantum- measurements-using-position-entangled-atomic-states END:VEVENT BEGIN:VEVENT UID:4b65f5a1-1ec4-4218-bf91-3ee57a2cac9e DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260210T075328Z DESCRIPTION:Speaker: Ben Feldman\, Stanford University\n\nStacking van der Waals layers provides new opportunities to design electronic band structur e. The weak bonding between layers both enables the addition of a relative twist and allows for relaxation into distinct local stacking configuratio ns. In this talk\, I will describe joint imaging and transport studies of twisted trilayer graphene which reveal how these factors generate a rich i nterplay between structural and electronic degrees of freedom over a varie ty of length scales. I will discuss distinct limits of interlayer angles a nd how our results inform the broader phase diagram of quantum electronic phases in twisted moiré multilayers. DTSTART;TZID=America/Los_Angeles:20260226T123000 DTEND;TZID=America/Los_Angeles:20260226T133000 LAST-MODIFIED:20260210T075328Z LOCATION:PAT C520 SUMMARY:: Twisted trilayer graphene under the microscope TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-02-26/twisted-trilayer-graphene -under-microscope END:VEVENT BEGIN:VEVENT UID:87011f61-1fc9-4d7e-882c-930c431e253c DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260228T012033Z DESCRIPTION:Speaker: Charlotte Georgine Lang Boettcher\, Stanford Universit y\n\nThis talk will explore how the physics of the superconductor–insulato r transition (SIT) can be leveraged for new approaches to designing and de veloping superconducting quantum circuits. The SIT is a fundamental quantu m phase transition governed by quantum\, rather than thermal\, fluctuation s. On the superconducting side of the transition\, the phase of the local order parameter serves as the good quantum number\, enabling Cooper pairs to flow without resistance. On the insulating side\, the conjugate variabl e — charge — becomes the good quantum number\, and vortices flow freely. S uperconducting qubits are circuits with one degree of freedom that similar ly exhibit regimes where either charge or phase is a good quantum number. Just as charge–phase duality underlies the SIT\, it also lies at the core of superconducting qubits\, giving rise to dual architectures such as the transmon and the blochnium qubit. This talk will show efforts to engineer qubits from materials tuned near their SIT\, where nanoscale weak links na turally emerge and provide the nonlinearity required for qubits—demonstrat ed here in devices built from a single film of niobium nitride. Finally\, I will discuss how these same junctions\, that are the building blocks of superconducting qubits\, can be fabricated into networks to serve as a ste ppingstone to realize solid-state quantum simulators and study interacting many-body systems such as the Hubbard model.  DTSTART;TZID=America/Los_Angeles:20260305T113000 DTEND;TZID=America/Los_Angeles:20260305T123000 LAST-MODIFIED:20260304T194315Z LOCATION:PAT C520 SUMMARY:: New Josephson junctions for solid state qubits and quantum simula tors TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-03-05/new-josephson-junctions-s olid-state-qubits-and-quantum-simulators END:VEVENT BEGIN:VEVENT UID:1f5dfeb8-a8f1-4bfc-8cfb-b3d4857a5dd7 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260112T074338Z DESCRIPTION:Speaker: T Serkan Kasirga\, Bilkent University\n\nUnlike three- dimensional materials\, screening of the interaction across quasiparticles in atomically thin materials can significantly alter their electronic and phononic properties. Earlier studies have demonstrated that dielectric sc reening can modify material parameters\, including electronic mobility\, c onductivity\, Raman modes\, Seebeck coefficient\, and photoluminescence\, in semiconducting two-dimensional (2D) materials. In this talk\, I will di scuss our efforts on finding novel two-dimensional materials with phase tr ansitions via interlayer space modification and how screening modification via substrate engineering can be used in conjunction with scanning photoc urrent microscopy to investigate the fundamental properties of 2D material s\, such as photoresponse mechanisms. Moreover\, I will illustrate how met als can be used to achieve screening\, despite the odds\, at the ultimate proximity to control the excitonic light emission from semiconducting 2D m aterials. Ultimately\, I will attempt to demonstrate how screening effects can be leveraged to enhance various electronic and optical properties of two-dimensional materials. DTSTART;TZID=America/Los_Angeles:20260312T123000 DTEND;TZID=America/Los_Angeles:20260312T133000 LAST-MODIFIED:20260112T075240Z LOCATION:PAT C520 SUMMARY:: Optoelectronics and phase transitions of atomically thin material s via proximity engineering nbsp TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-03-12/optoelectronics-and-phase -transitions-atomically-thin-materials-proximity END:VEVENT BEGIN:VEVENT UID:9c294829-26f1-4519-9e54-adff09a52561 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260324T132122Z DESCRIPTION:Speaker: Yuan Cao\, University of California at Berkeley\n\nTwo -dimensional materials (2DM) and their heterostructures offer tunable elec trical and optical properties\, primarily modifiable through electrostatic gating and twisting. While electrostatic gating is a well-established met hod for manipulating 2DM\, achieving real-time control over interfacial pr operties remains a frontier in exploring 2DM physics and advanced quantum device technology. Current methods\, often reliant on scanning microscopes \, are limited in their application scope\, lacking the accessibility and scalability of electrostatic gating at the device level. In the first half of this seminar\, I will introduce an on-chip platform for 2DM with in si tu adjustable interfacial properties\, employing a microelectromechanical system (MEMS). This platform comprises compact\, precise\, and versatile d evices capable of voltage-controlled manipulation of 2DM\, including appro aching\, twisting\, and pressurizing actions. We demonstrate this technolo gy by creating synthetic topological singularities in the nonlinear optica l susceptibility of twisted hexagonal boron nitride (h-BN).In the second h alf of this seminar\, I will talk about our recent progress in observing s ymmetry-forbidden second-harmonic generation in almost any 2D crystals\, w hich is extremely useful for deterministic twistronics. Optical spectrosco py based on second-order nonlinearity is a critical technique for characte rizing two-dimensional (2D) crystals\, and it also finds numerous applicat ions in bioimaging and quantum optics. It has been generally believed that second-harmonic generation (SHG) in crystals with inversion centers (cent rosymmetric crystals)\, such as graphene and other bilayer 2D crystals\, i s negligible without externally breaking the symmetry via strong surface e ffects. However\, with a new ultra-sensitive detection technique\, we coul d circumvent the symmetry-imposed constraint and observe robust SHG in pri stine centrosymmetric crystals\, even without any symmetry-breaking field. With the exceptional sensitivity\, we directly observe polarization-resol ved SHG in bilayer hexagonal boron nitride (h-BN)\, bilayer WSe2\, and rem arkably\, Bernal-stacked bilayer graphene\, allowing us to unambiguously i dentify the crystallographic orientation in all these crystals via SHG. We also demonstrate that the new technique can be used to non-invasively det ect uniaxial strain and geometric phase in these centrosymmetric crystals. DTSTART;TZID=America/Los_Angeles:20260402T123000 DTEND;TZID=America/Los_Angeles:20260402T133000 LAST-MODIFIED:20260324T132122Z SUMMARY:: Towards reconfigurable and deterministic twistronic 2D materials TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-04-02/towards-reconfigurable-an d-deterministic-twistronic-2d-materials END:VEVENT BEGIN:VEVENT UID:d18b6bda-cb2a-4df4-9870-5538acc0509e DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260403T172600Z DESCRIPTION:Speaker: James Analytis\, UC Berkeley\n\nMaterials near a metal -insulator transition are central to many of the most vexing problems in c ondensed matter. Here I discuss a few examples where electron spin and cha rge are on the boundary of localization\, but not simultaneously. We study how quenched disorder plays a critical role in understanding which quasip articles emerge and how they can be delocalized near a metal-insulator tra nsition. DTSTART;TZID=America/Los_Angeles:20260409T123000 DTEND;TZID=America/Los_Angeles:20260409T133000 LAST-MODIFIED:20260403T172600Z LOCATION:PAT C520 SUMMARY:: Unstable itinerancy how a pinch of disorder can delocalize carrie rs of charge and entropy in correlated nbsp systems TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-04-09/unstable-itinerancy-how-p inch-disorder-can-delocalize-carriers-charge-and-entropy END:VEVENT BEGIN:VEVENT UID:c56138f8-21f2-4279-bb82-1a51e18dca8f DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260319T190325Z DESCRIPTION:Speaker: Lukas Beringer\, University of Regensburg\, Germany\n \nChaos is often viewed as an obstacle to control. However\, the field of controlling chaos shows that chaotic classical systems can actually be ste ered efficiently using very small perturbations\, by harnessing their inst ability and ergodic behaviour . In direct analogy\, recent work has demons trated that localized quantum states can be transported along trajectories related to the classical dynamics of the system\, enabling fast and preci se quantum state control. This approach has been successfully applied both to single-particle quantum systems [1\,2] and to interacting bosonic syst ems described by the Bose–Hubbard model [3]. While interesting\, this appr oach is classical at its core and does not take advantage of quantum inter ference. However\, quantum chaos in general offers universal features\, na mely the exponential decay of the Loschmidt echo as well as the statistica l properties described by random matrix theory\, that replace the classica l notions of instability and ergodicity in the context of quantum systems (even in the absence of a classical limit). We argue that these features a re essential for full state controllability and allow the translation of c lassical chaos control to the quantum realm [4].[1] S. Tomsovic\, J. D. Ur bina\, and Klaus Richter\, Controlling Quantum Chaos: Optimal Coherent Tar geting\, PRL 130.2 (2023): 020201[2] S. Tomsovic\, J. D. Urbina\, and Klau s Richter\, Controlling quantum chaos: Time-dependent kicked rotor\, PRE 1 08 (2023): 044202[3] L. Beringer\, M. Steinhuber\, J. D. Urbina\, K. Richt er\, S. Tomsovic\, Controlling many-body quantum chaos: Bose-Hubbard syste ms\, New J. Phys (2024): 26 073002[4] L. Beringer\, M. Steinhuber\, K. Ric hter\, S. Tomsovic\, Quantum Chaos as an Essential Resource for Full Quant um State Controllability\, arxiv:2512.13385  DTSTART;TZID=America/Los_Angeles:20260423T123000 DTEND;TZID=America/Los_Angeles:20260424T000000 LAST-MODIFIED:20260319T190450Z LOCATION:PAT C520 SUMMARY:: Quantum Chaos as a Resource for Quantum Control TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-04-23/quantum-chaos-resource-qu antum-control END:VEVENT BEGIN:VEVENT UID:af43eb00-854e-41cf-8dba-2609fabf7d4d DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260313T171852Z DESCRIPTION:Speaker: Charles Brown\, Yale University\n\nQuasicrystals are n ot spatially periodic\, yet they exhibit long-range order. These aperiodic crystals feature rotational symmetries that are mathematically forbidden in periodic crystals. In 1984\, Shechtman performed X-ray diffraction meas urements on a metallic alloy\, revealing 10-fold rotational symmetry in th e diffraction pattern\, which was thought to be impossible. This work even tually led to the redefinition of what constitutes a crystal\, and the rec ognition of the reality of aperiodic crystals. Shechtman was then awarded the 2011 Nobel prize in chemistry for the discovery of aperiodic crystals. In recent decades\, band structure and its interplay with topology have p rovided deep insight into intriguing behavior in periodic crystalline quan tum materials. However\, thirty years after the discovery of aperiodic cry stals\, the role of the energy spectrum and its interplay with topology is not well-understood for quasicrystals because standard theoretical method s used to study the energy spectrum of a crystal has relied on translation al symmetry. An experimental apparatus that can emulate the quantum physic s of quasicrystals would open a window into quasicrystalline “band structu re” and topology that is difficult to access with theoretical and analytic al methods alone. This talk will describe the design of such an apparatus\ , in which a quantum gas is confined within a 10-fold rotation-symmetric q uasiperiodic optical lattice and will mention planned first measurements. DTSTART;TZID=America/Los_Angeles:20260507T123000 DTEND;TZID=America/Los_Angeles:20260507T133000 LAST-MODIFIED:20260313T171852Z LOCATION:PAT C520 SUMMARY:: Quasicrystals of Ultracold Quantum Matter TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-05-07/quasicrystals-ultracold-q uantum-matter END:VEVENT BEGIN:VEVENT UID:728144b1-4552-4799-a18b-c2ad35fa9f10 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260514T223154Z DESCRIPTION:Speaker: Dan Parker\, UCSD\n\nRecent experiments on rhombohedra l multilayer graphene (RMG) with a substrate-induced moire potential have identified both Chern insulators and fractional Quantum Hall states at zer o magnetic field\, whose origin is presently mysterious. The operative deg rees of freedom are in the valence band minima\, which feature strong corr elations and non-trivial quantum geometry. The first part of this talk wil l study a microscopic model of RMG. I will show that\, even without a moir e potential\, interactions spontaneously break continuous translation symm etry and time-reversal symmetry at the mean-field level to produce an elec tron crystal with finite Chern number. Such a state is called an anomalous Hall crystal. Many-body numerics at fractional fillings then reveal fract ionalized ground states\, consistent with experiments. I will also show ho w metallic Wigner crystals form and naturally explain a puzzling pocket of hole carriers in experiments. The second part of the talk will introduce λ-jellium\, a minimal extension of the jellium model whose interaction str ength and Berry curvature are independently tunable. I will present eviden ce that it hosts an anomalous Hall crystal phase that is stable to quantum fluctuations. DTSTART;TZID=America/Los_Angeles:20260514T123000 DTEND;TZID=America/Los_Angeles:20260514T133000 LAST-MODIFIED:20260514T223154Z LOCATION:PAT 520 SUMMARY:: From Rhombohedral Graphene to Anomalous Hall Crystals TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-05-14/rhombohedral-graphene-ano malous-hall-crystals END:VEVENT BEGIN:VEVENT UID:b91c040b-de1d-46a8-9cf3-df2cfb754f72 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260519T180836Z DESCRIPTION:Speaker: Javier Sanchez-Yamagishi\, UC Irvine\n\nShaping crysta ls into confined geometries with low disorder is an outstanding challenge. We have developed an approach to growing thin crystals of predefined geom etry between atomically flat van der Waals (vdW) materials. This is achiev ed by injecting molten material into silica molds lined by vdW materials. Following this approach\, we can directly produce ultraflat single crystal s of bismuth\, tin\, indium\, lead\, and tellurium in various geometries\, including hall bars and nanowires\, that are fully encapsulated within a vdW material. The combination of geometric control\, confinement\, low dis order\, and oxidation protection unlocks a new regime for single-crystal q uantum devices. This approach provides a path to unlocking the transport p hysics of two-dimensional bismuth\, a predicted room-temperature topologic al insulator. I will also discuss how this approach can be extended to rea lize unique heterostructures of vdW and non-vdW materials\, such as superc onducting junctions\, or to trap molecules and atoms for quantum sensing.T ime permitting\, I will also discuss how driven electrons in graphene can be used to generate and detect terahertz sound waves via an acoustic analo g of Cerenkov radiation. Exceptional electronic transport and quantum osci llations in thin bismuth crystals grown inside van der Waals materialsChen et. al. Nature Materials 2024Van der Waals injection-molded crystalsTran et. al. npj 2D Materials and Applications 2025Electrically driven amplific ation of terahertz acoustic waves in grapheneBarajas-Aguilar et. al. Natur e Communications 2024 DTSTART;TZID=America/Los_Angeles:20260527T101500 DTEND;TZID=America/Los_Angeles:20260527T111500 LAST-MODIFIED:20260519T180836Z LOCATION:PAB B421 SUMMARY:: Growing crystals inside van der Waals materials TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-05-27/growing-crystals-inside-v an-der-waals-materials END:VEVENT BEGIN:VEVENT UID:bd39ab0a-ead7-4011-9c3e-c45d83cc479e DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260514T223417Z DESCRIPTION:Speaker: Jiun-Haw Chu\n\nCharge density waves (CDWs) with multi -component order parameters can break unexpected symmetries through the in terplay of nearly degenerate instabilities. In 1T-TiSe₂\, whether the CDW spontaneously breaks mirror and inversion symmetries to form a chiral stat e has remained controversial\, with previous experiments reporting conflic ting results. We resolve this controversy by identifying the bulk broken s ymmetry as ferroaxial: vertical mirrors are broken while inversion is pres erved. Symmetry-resolved elastoresistivity reveals off-diagonal coefficien ts forbidden in both the high-temperature phase and the widely accepted tr iple-Q CDW state\, providing direct evidence that mirror symmetries are br oken below T_CDW ~ 200 K while inversion is retained. The diagonal coeffic ients show a divergent nematic susceptibility only at a much lower tempera ture\, T_nem ~ 165 K\, establishing that nematic order is not responsible for the mirror symmetry breaking near T_CDW. Elastocaloric measurements re solve two successive transitions: a primary CDW onset and a secondary tran sition approximately 7 K below\, consistent with the condensation of a sec ondary CDW mode required to produce ferroaxial order. Together\, these dat a establish a hierarchy of symmetry-breaking transitions in which the prim ary CDW is followed by a ferroaxial instability\, which in turn acts as th e parent state for a secondary nematic instability. The proposed 'chiral' CDW in 1T-TiSe₂ is thus a centrosymmetric ferroaxial state\, reconciling p revious surface-sensitive observations with bulk symmetry constraints. DTSTART;TZID=America/Los_Angeles:20260528T123000 DTEND;TZID=America/Los_Angeles:20260528T133000 LAST-MODIFIED:20260526T232705Z LOCATION:PAT C520 SUMMARY:: Hidden Symmetry Breaking in 1T TiSe Probed by Strain TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-05-28/hidden-symmetry-breaking- 1t-tise-probed-strain END:VEVENT BEGIN:VEVENT UID:6ac9f6c6-c5ca-4a9a-b7fc-de5a2e51a72f DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260519T181138Z DESCRIPTION:Speaker: Ludwig Holleis\, UC Santa Barbara\n\nStrong electron-e lectron interactions govern the low-temperature physics of rhombohedral mu ltilayer graphene (RMG)\, leading to many different magnetic and supercond ucting phases. Fundamentally\, all these phases emerge from magnetic and e lectronic correlations at elevated temperatures associated with excess mag netic entropy and short electron-electron correlation lengths. To study th is regime\, a clear hierarchy of interaction length\, sample size and mome ntum relaxation length needs to be achieved\, each separated by at least a n order of magnitude. To this end\, I introduce cryogenic shock exfoliatio n that produces the metastable RMG stock on a large scale\, as well as new fabrication methods in order to reliably fabricate RMG nanoelectronics th at satisfy mobility and size requirements.In these improved devices\, I un cover a fluctuating moment regime with excess entropy of ΔS ≈ k_B per carr ier above the ordering temperatures – a signature of local moments entirel y unexpected in an itinerant metal such as RMG. At first-order phase bound aries between competing isospin-polarized states\, this entropy drives an isospin Pomeranchuk effect – leading to order with increasing temperature. Scanning nanoSQUID-on-tip magnetometry of current flow in RMG reveals tha t electrons at these temperatures behave like a liquid\, and the charge tr ansport is governed by the Gurzhi effect. This places RMG into the semi-qu antum liquid regime where strong electron hydrodynamics appears at the sca le of the Fermi wavelength equal to the isospin correlation length. Lastly \, by increasing the device size\, I demonstrate a crossover from Poiseuil le to porous electron flow where the liquid is effectively no longer const rained by the sample boundaries.  DTSTART;TZID=America/Los_Angeles:20260611T003000 DTEND;TZID=America/Los_Angeles:20260611T013000 LAST-MODIFIED:20260519T181138Z LOCATION:PAB B421 SUMMARY:: Fluctuating electron liquids in ultra high mobility rhombohedral graphene nanoelectronics TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-06-11/fluctuating-electron-liqu ids-ultra-high-mobility-rhombohedral-graphene END:VEVENT BEGIN:VEVENT UID:e53544e5-cfab-47c5-9266-067290d89ddc DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260709T200231Z DESCRIPTION:Speaker: Elizabeth Nowadnick\, UC Merced\n\nFerroelectrics\, wh ich are materials that host an electrical polarization that can be reverse d by an applied electric field\, are of enduring fundamental scientific in terest and have numerous electronic\, sensing\, and energy applications. I n this talk\, I will highlight two examples of how first-principles calcul ations can reveal new functionalities in ferroelectric oxides. First\, I w ill discuss isolated magnetic dopants in ferroelectric oxides as a platfor m for electric-field control of single spins. Our density functional theor y (DFT) calculations reveal that a magnetic dopant’s magnetocrystalline an isotropy energy\, and hence its preferred spin orientation\, is highly tun able through changes to ferroelectric structural distortions. Second\, I w ill present our discovery of an unusual electric auxetic effect in several families of ferroelectric layered perovskites\, in which polarization inc reases under both longitudinal and transverse applied stress. This unconve ntional electromechanical behavior offers a pathway towards designing larg e hydrostatic piezoelectric responses\, which are of interest for underwat er sensing applications. I also will comment on some of our future researc h directions arising from these works. DTSTART;TZID=America/Los_Angeles:20260715T113000 DTEND;TZID=America/Los_Angeles:20260715T123000 LAST-MODIFIED:20260709T200231Z LOCATION:PAB B421 SUMMARY:: New functionalities in ferroelectric oxides from spin control to unconventional piezoelectricity TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-07-15/new-functionalities-ferro electric-oxides-spin-control-unconventional END:VEVENT BEGIN:VEVENT UID:f78676f8-0bcf-474c-90c1-96c84832cc74 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260714T000551Z DESCRIPTION:Speaker: Liudmila Zhukas\, Duke University\n\n Trapped-ion plat forms are among the highest-performing quantum computing technologies toda y and have already transitioned into industrial systems. In this talk\, I outline how we engineer and operate a trapped-ion platform at Duke as a re liable\, application-driven system\, and how we translate atomic-physics-l evel control into a software execution stack that automates scheduling\, m onitoring\, and calibration to enable reproducible experiments at scale. I n the next part\, I will focus on the digital regime\, where universal gat e sets enable programmable circuits and closed-loop hybrid quantum-classic al optimization under finite-shot constraints. This gate-based workflow su pports a broad range of applications on the same hardware. I will show how it enables (i) Hamiltonian learning\, including a symmetry-protected sign ature that isolates genuine three-body interactions even in the presence o f unknown lower-body terms\; (ii) molecular energy estimation using CAFQA- initialized variational quantum eigensolver\, reducing the amount of on-ha rdware variational tuning needed\; and (iii) quantum machine learning meth ods that leverage the structure of Hilbert space to learn useful represent ations from data.  Finally\, in contrast to the digital regime\, I discuss the analog regime\, where we program the device by engineering an effecti ve Hamiltonian and using the ions’ native interactions directly.   DTSTART;TZID=America/Los_Angeles:20260716T123000 DTEND;TZID=America/Los_Angeles:20260716T133000 LAST-MODIFIED:20260714T000551Z LOCATION:PAB B421 SUMMARY:: From Laser Pulses to Algorithms Engineering Trapped Ion Quantum S ystems TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-07-16/laser-pulses-algorithms-e ngineering-trapped-ion-quantum-systems END:VEVENT BEGIN:VEVENT UID:b261f321-e913-488b-a1f8-12c2b8689dab DTSTAMP:20260825T131105Z CATEGORIES:Conferences CLASS:PUBLIC CREATED:20260708T171058Z DESCRIPTION:Speaker: Multiple speakers\n\nNew developments in electron corr elations and order in low-dimensional systemsSee the workshop home page be low for registration (which is free!)\, list of attendees and other inform ation. DTSTART;TZID=America/Los_Angeles:20260824T000000 DTEND;TZID=America/Los_Angeles:20260826T235900 LAST-MODIFIED:20260708T171426Z LOCATION:PAA 118 and PAA Foyer SUMMARY:: TIQM 2026 Summer Workshop TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-08-24/tiqm-2026-summer-workshop END:VEVENT BEGIN:VEVENT UID:44301a4e-c9d1-4aca-923c-46fa10e070f4 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260416T171442Z DESCRIPTION:Speaker: Brad Ramshaw\, Cornell University\n\nFor more than a c entury\, superconductors have been the paradigmatic 'quantum material'\, p roviding fundamental discoveries like gauge symmetry breaking and impactin g technologies from medical imaging to quantum computing. Despite their ce ntral importance\, characterizing new types of superconductors is still a difficult task: all superconductors have zero resistance\, but their more subtle properties related to entanglement and topology are hard to probe e xperimentally. I will introduce chiral topological superconductors in two dimensions - a type of superconductivity with a 'knot' in the superconduct ing wave function. These superconductors can host Majorana edge modes and bound states in their vortex cores\, but finding a real-life example has p roven challenging. I will show how we use ultrasound - deforming a crystal line lattice in a manner not unlike how gravity waves deform spacetime - t o test whether a particular superconductor has the 'right ingredients' to be a 2D topological superconductor. I will present the progress we have ma de thus far - ruling out many proposed candidate materials and discovering an unexpected new type of superconductivity along the way. Most recently\ , this has led us to the discovery of a multi-component superconducting st ate in UTe2 under hydrostatic pressure - a state that may indeed be topolo gical. Finally\, I will give a prognosis for what I think the most promisi ng route is for discovering a 2D topological superconductor. DTSTART;TZID=America/Los_Angeles:20261119T003000 DTEND;TZID=America/Los_Angeles:20261119T013000 LAST-MODIFIED:20260416T171442Z LOCATION:PAT C520 SUMMARY:: Searching for chiral superconductors using ultrasound TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-11-19/searching-chiral-supercon ductors-using-ultrasound END:VEVENT BEGIN:VEVENT UID:ccedfeb7-9c36-4591-92e7-45ed79fc4f01 DTSTAMP:20260825T131105Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260708T173714Z DESCRIPTION:Speaker: Tristan Shi\, UW Chemistry\n\nTBA DTSTART;TZID=America/Los_Angeles:20261203T003000 DTEND;TZID=America/Los_Angeles:20261203T013000 LAST-MODIFIED:20260708T173745Z LOCATION:PAT C520 SUMMARY:: Title TBA TRANSP:OPAQUE URL:https://phys.washington.edu/events/2026-12-03/title-tba END:VEVENT END:VCALENDAR