Many-Particle Dephasing after a Quench
Kiendl T, Marquardt F (2017)
Publication Type: Journal article
Publication year: 2017
Journal
Book Volume: 118
Article Number: 130601
Journal Issue: 13
DOI: 10.1103/PhysRevLett.118.130601
Abstract
After a quench in a quantum many-body system, expectation values tend to relax towards long-time averages. However, temporal fluctuations remain in the long-time limit, and it is crucial to study the suppression of these fluctuations with increasing system size. The particularly important case of nonintegrable models has been addressed so far only by numerics and conjectures based on analytical bounds. In this work, we are able to derive analytical predictions for the temporal fluctuations in a nonintegrable model (the transverse Ising chain with extra terms). Our results are based on identifying a dynamical regime of "many-particle dephasing," where quasiparticles do not yet relax but fluctuations are nonetheless suppressed exponentially by weak integrability breaking.
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APA:
Kiendl, T., & Marquardt, F. (2017). Many-Particle Dephasing after a Quench. Physical Review Letters, 118(13). https://doi.org/10.1103/PhysRevLett.118.130601
MLA:
Kiendl, Thomas, and Florian Marquardt. "Many-Particle Dephasing after a Quench." Physical Review Letters 118.13 (2017).
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