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Quantum Nanophotonics Hardware: From Nanofabrication to Quantum Circuit Mapping

Marina Radulaski, UC Davis
Monday, November 15, 2021 - 4:00pm
PAA A-102

Collaboration with QuantumX

Photonic systems are the leading candidates for deterministic quantum sources, quantum repeaters, and other key devices for quantum information processing. Scalability of this technology depends on the stability, homogeneity and coherence properties of quantum emitters. Here, color centers in wide band gap materials offer favorable properties for applications in quantum memories, single-photon sources, quantum sensors, and spin-photon interfaces [1]. Silicon carbide, in particular, has been an attractive commercial host of color centers featuring fiber-compatible single photon emission, long spin-coherence times and nonlinear optical properties [2]. Integration of color centers with nanophotonic devices has been a challenging task, but significant progress has been made with demonstrations up to 120-fold resonant emission enhancement of emitters embedded in photonic crystal cavities [3]. A novel direction in overcoming the integration challenge has been the development of triangular photonic devices, recently shown to preserve millisecond-scale spin-coherence in silicon carbide defects [4, 5]. Triangular photonics has promising applications in quantum networks, integrated quantum circuits, and quantum simulation. Here, open quantum system modeling provides insights into polaritonic physics achievable with realistic device parameters through evaluation of cavity-protection, localization and phase transition effects [6]. Mapping of this dynamics to gate-based quantum circuits opens door for quantum advantage in understanding cavity quantum electrodynamical (QED) effects using commercial Noisy Intermediate-Scale Quantum (NISQ) hardware [7].

[1] V. A. Norman, S. Majety, Z. Wang, W. H. Casey, N. Curro, M. Radulaski, “Novel color center platforms enabling fundamental scientific discovery,” InfoMat, 1-24 (2020).
[2] G. Moody, et al., "Roadmap on Integrated Quantum Photonics," to appear in Journal of Physics: Photonics, arXiv.2102.03323.
[3] D. M. Lukin, C. Dory, M. A. Guidry, K. Y. Yang, S. D. Mishra, R. Trivedi, M. Radulaski, S. Sun, D. Vercruysse, G. H. Ahn, J. Vučković, “4H-Silicon-Carbide-on-Insulator for Integrated Quantum and Nonlinear Photonics,” Nature Photonics 14, 330-334 (2020).
[4] S. Majety, V. A. Norman, L. Li, M. Bell, P. Saha, M. Radulaski, “Quantum photonics in triangular-cross-section nanodevices in silicon carbide,” J. Phys. Photonics 3, 034008 (2021).
[5] 1.  C. Babin, R. Stöhr, N. Morioka, T. Linkewitz, T. Steidl, R. Wörnle1, D. Liu, V. Vorobyov, A. Denisenko, M. Hentschel, G. Astakhov, W. Knolle, S. Majety, P. Saha, M. Radulaski, N.T. Son, J. Ul-Hassan, F. Kaiser, J. Wrachtrup, “Nanofabricated and integrated color centers in silicon carbide with high-coherence spin-optical properties,” arXiv.2109.04737, to appear in Nature Materials (2021).
[6] V Norman, J Patton, R Scalettar, M Radulaski, “Multi-emitter cavity QED with color centers,” Bulletin of the American Physical Society, 2021.
[7] M Krstic Marinkovic, M Radulaski, “Tavis-Cummings open quantum system modeling on a commercial quantum computer,” Bulletin of the American Physical Society, 2021.

Colloquium Recording (Will appear after colloquium has started)

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