Seminar: Dr Hendrik Weimer, Leibniz Universität Hannover, Germany

Last updated October 18, 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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We are a Research Cluster of the School of Mathematics and Physics at Queen’s University Belfast in Northern Ireland. Our research interests are focused primarily on computational and theoretical physics.

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