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Title: Non-stationary coherent quantum many-body dynamics through dissipation
Authors: Bu?a, B.
Tindall, J.
Jaksch, D. 
Issue Date: 2019
Publisher: Nature Publishing Group
Citation: Bu?a, B., Tindall, J., Jaksch, D. (2019). Non-stationary coherent quantum many-body dynamics through dissipation. Nature Communications 10 (1) : 1730. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: The assumption that quantum systems relax to a stationary state in the long-time limit underpins statistical physics and much of our intuitive understanding of scientific phenomena. For isolated systems this follows from the eigenstate thermalization hypothesis. When an environment is present the expectation is that all of phase space is explored, eventually leading to stationarity. Notable exceptions are decoherence-free subspaces that have important implications for quantum technologies and have so far only been studied for systems with a few degrees of freedom. Here we identify simple and generic conditions for dissipation to prevent a quantum many-body system from ever reaching a stationary state. We go beyond dissipative quantum state engineering approaches towards controllable long-time non-stationarity typically associated with macroscopic complex systems. This coherent and oscillatory evolution constitutes a dissipative version of a quantum time crystal. We discuss the possibility of engineering such complex dynamics with fermionic ultracold atoms in optical lattices. © 2019, The Author(s).
Source Title: Nature Communications
ISSN: 2041-1723
DOI: 10.1038/s41467-019-09757-y
Rights: Attribution 4.0 International
Appears in Collections:Staff Publications

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