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From quantum computation to quantum signal processing: the power of a single qubit

Isaac Chuang, MIT
Monday, January 8, 2018 - 4:00pm to 5:00pm
PAA A-102
Quantum computers are celebrated for their ability to rapidly solve certain computational problems, while quantum metrology offers increased sensitivity, beyond standard shot-noise limits. A common denominator is the lowly two-level quantum system, oft explored, but never fully appreciated. Drawing on techniques from classical signal processing, we theoretically predict, and experimentally demonstrate with a trapped ion, how composite gates on a single qubit allows Heisenberg-limited imaging. We also show how such "quantum signal processing" gives rise to unexpected computational power, providing a novel algorithm for simulation of physical Hamiltonians which saturates optimality bounds.​

​Watch a video of the talk here​.

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