Seminar: Dr Hendrik Weimer, Leibniz Universität Hannover, Germany
Last updated April 8, 2021 by Dermot Green
Wednesday 14 April, 3pm
Location: MS Teams
Speaker: Dr Hendrik Weimer, Institut für Theoretische Physik, Leibniz Universität Hannover, Germany
Title: Using controlled dissipation for quantum simulation
Abstract:
Adding dissipation channels to quantum simulation devices can achieve
two important goals. On the one hand, dissipation can cool the
simulator to a low-energy state that can be used subsequently in
further simulations [1]. On the other hand, adding dissipation to a
quantum simulator allows to realize novel classes of dynamical systems
with intriguing properties. I will focus on the investigation of a
quantum version of an elementary cellular automaton, which results in
extremely complex dynamics whose statistical properties can only be
predicted by actually running the simulation. Remarkably, it is
possible for this complex dynamics to coexist with quantum
entanglement. Finally, I will comment on the realization of such
cellular automata on current quantum simulation devices based on
ultracold Rydberg atoms, by using a variational principle for open
quantum systems [2] to engineer the required many-body interactions.
[1] M. Raghunandan, F. Wolf, C. Ospelkaus, P. O. Schmidt, H. Weimer,
Science Adv. 6, eaaw9268 (2020).
[2] H. Weimer, PRL 114, 040402 (2015).
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