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Absence of dynamical localization in interacting driven systems

by David J. Luitz, Yevgeny Bar Lev, Achilleas Lazarides

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Submission summary

Authors (as Contributors): Yevgeny Bar Lev · Achilleas Lazarides · David J. Luitz
Submission information
Arxiv Link: http://arxiv.org/abs/1706.09429v2 (pdf)
Date accepted: 2017-10-06
Date submitted: 2017-09-29 02:00
Submitted by: Luitz, David J.
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
Specialties:
  • Condensed Matter Physics - Theory
Approach: Theoretical

Abstract

Using a numerically exact method we study the stability of dynamical localization to the addition of interactions in a periodically driven isolated quantum system which conserves only the total number of particles. We find that while even infinitesimally small interactions destroy dynamical localization, for weak interactions density transport is significantly suppressed and is asymptotically diffusive, with a diffusion coefficient proportional to the interaction strength. For systems tuned away from the dynamical localization point, even slightly, transport is dramatically enhanced and within the largest accessible systems sizes a diffusive regime is only pronounced for sufficiently small detunings.

Published as SciPost Phys. 3, 029 (2017)



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