Programmable Quantum Simulators with Atoms and Ions

Programmable Quantum Simulators with Atoms and Ions
Peter Zoller, Center for Quantum Physics, University of Innsbruck, and Institute for Quantum Optics and Quantum Information, Innsbruck, Austrian Academy of Sciences, Austria
Peter Zoller
Date and time: Thu, Nov 05, 2020 - 11:30am
Location: Remote, Zoom based
Category: Condensed Matter Seminar

Quantum optical systems with cold atoms and ions provide one of the best ways to build controllable quantum many-body systems as quantum computers and quantum simulators. Here we report on recent developments in building, and in particular programming quantum simulators based on trapped ions as intermediate scale quantum devices. We address, and illustrate this for a range of applications from solving the quantum many-body problem, to developing and implementing novel measurement protocols for many-body observables, and questions of verification and validation of quantum devices. Examples highlighting these developments include the implementation of self-verifying variational quantum simulations, illustrated here by computing the ground state and quantum phase transition of a Schwinger Model. In addition, we discuss the development and demonstration of a `randomized measurement toolbox', allowing to access in experiments quantities like Renyi entanglement entropies and the entanglement spectrum; and an experimentally feasible protocol for cross-platform verification of intermediate scale quantum devices. 

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