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SUMMARY:ESE Spring Colloquium - "Quantum Many-Body Physics in the NISQ Era"
DESCRIPTION:Rapid progress in quantum computing technologies is ushering in a new era for quantum many-body physics. Today’s noisy\, intermediate-scale quantum (NISQ) devices\, while still far from fault-tolerant quantum computers\, are exceptional laboratory systems\, with large many-body Hilbert spaces and unprecedented capabilities for control and measurement. This allows the exploration of quantum dynamics in new far-from-equilibrium regimes\, and motivates new paradigms of phase structure. In this talk I will focus on two such paradigms: eigenstate-ordered phases in periodically driven systems\, and entanglement phases in “monitored” systems\, whose dynamics include projective measurements alongside unitary operations. As an example of the former\, I will discuss the realization of a “discrete time crystal” (DTC) on Google Quantum AI’s Sycamore processor\, focusing on the conceptual challenges involved in detecting the DTC’s signature eigenstate order despite intrinsic limitations of NISQ hardware. I will then present a new window into measurement-induced entanglement phases based on the idea of space-time duality: a transformation that relates unitary and monitored circuits by exchanging the roles of space and time in the dynamics\, which can be implemented on digital quantum simulators through a generalized “quantum teleportation” protocol.
URL:https://seasevents.nmsdev7.com/event/ese-spring-colloquium-quantum-many-body-physics-in-the-nisq-era/
LOCATION:Raisler Lounge (Room 225)\, Towne Building\, 220 South 33rd Street\, Philadelphia\, PA\, 19104\, United States
CATEGORIES:Seminar,Colloquium
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