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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