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Role of interactions in a dissipative many-body localized system

Everest, B.; Lesanovsky, Igor; Garrahan, Juan P.; Levi, Emanuele

Authors

B. Everest

Emanuele Levi Emanuele.Levi@nottingham.ac.uk



Abstract

Recent experimental and theoretical efforts have focused on the effect of dissipation on quantum many-body systems in their many-body localized (MBL) phase. While in the presence of dephasing noise such systems reach a unique ergodic state, their dynamics is characterized by slow relaxation manifested in nonexponential decay of self-correlations. Here we shed light on a currently much debated issue, namely, the role of interactions for this relaxation dynamics. We focus on the experimentally relevant situation of the evolution from an initial charge density wave in the presence of strong dephasing noise. We find a crossover from a regime dominated by disorder to a regime dominated by interactions, with an accompanying change of time correlators from stretched exponential to compressed exponential form. The strongly interacting regime can be explained in terms of nucleation and growth dynamics of relaxing regions—reminiscent of the kinetics of crystallization in soft matter systems—and should be observable experimentally. This interaction-driven crossover suggests that the competition between interactions and noise gives rise to a much richer structure of the MBL phase than anticipated so far.

Citation

Everest, B., Lesanovsky, I., Garrahan, J. P., & Levi, E. (2017). Role of interactions in a dissipative many-body localized system. Physical Review B, 95(2), https://doi.org/10.1103/PhysRevB.95.024310

Journal Article Type Article
Acceptance Date Jan 4, 2016
Publication Date Jan 1, 2017
Deposit Date Feb 9, 2017
Publicly Available Date Feb 9, 2017
Journal Physical Review B
Print ISSN 2469-9950
Electronic ISSN 2469-9969
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 95
Issue 2
DOI https://doi.org/10.1103/PhysRevB.95.024310
Public URL http://eprints.nottingham.ac.uk/id/eprint/40491
Publisher URL http://journals.aps.org/prb/abstract/10.1103/PhysRevB.95.024310
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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