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Title: Quench dynamics and Hall response of interacting Chern insulators

Abstract

We study the coherent nonequilibrium dynamics of interacting two-dimensional systems after a quench from a trivial to a topological Chern insulator phase. While the many-body wave function is constrained to remain topologically trivial under local unitary evolution, we find that the Hall response of the system can dynamically approach a thermal value of the postquench Hamiltonian, even though the efficiency of this thermalization process is shown to strongly depend on the microscopic form of the interactions. Quite remarkably, the effective temperature of the steady-state Hall response can be arbitrarily tuned with the quench parameters. In conclusion, our findings suggest a way of inducing and observing low-temperature topological phenomena in interacting ultracold atomic gases, where the considered quench scenario can be realized in current experimental setups.

Authors:
 [1];  [2];  [3]
  1. Univ. of Fribourg, Fribourg (Switzerland); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Technische Univ. Dresden, Dresden (Germany)
  3. Univ. of Fribourg, Fribourg (Switzerland)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1546722
Grant/Contract Number:  
AC02-76SF00515; 724103; 247310070
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 4; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Schüler, Michael, Budich, Jan Carl, and Werner, Philipp. Quench dynamics and Hall response of interacting Chern insulators. United States: N. p., 2019. Web. doi:10.1103/physrevb.100.041101.
Schüler, Michael, Budich, Jan Carl, & Werner, Philipp. Quench dynamics and Hall response of interacting Chern insulators. United States. doi:10.1103/physrevb.100.041101.
Schüler, Michael, Budich, Jan Carl, and Werner, Philipp. Tue . "Quench dynamics and Hall response of interacting Chern insulators". United States. doi:10.1103/physrevb.100.041101. https://www.osti.gov/servlets/purl/1546722.
@article{osti_1546722,
title = {Quench dynamics and Hall response of interacting Chern insulators},
author = {Schüler, Michael and Budich, Jan Carl and Werner, Philipp},
abstractNote = {We study the coherent nonequilibrium dynamics of interacting two-dimensional systems after a quench from a trivial to a topological Chern insulator phase. While the many-body wave function is constrained to remain topologically trivial under local unitary evolution, we find that the Hall response of the system can dynamically approach a thermal value of the postquench Hamiltonian, even though the efficiency of this thermalization process is shown to strongly depend on the microscopic form of the interactions. Quite remarkably, the effective temperature of the steady-state Hall response can be arbitrarily tuned with the quench parameters. In conclusion, our findings suggest a way of inducing and observing low-temperature topological phenomena in interacting ultracold atomic gases, where the considered quench scenario can be realized in current experimental setups.},
doi = {10.1103/physrevb.100.041101},
journal = {Physical Review B},
number = 4,
volume = 100,
place = {United States},
year = {2019},
month = {7}
}

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Cited by: 4 works
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