Activating Many-Body Localization in Solids by Driving with Light

Because of the presence of phonons, many-body localization (MBL) does not occur in disordered solids, even if disorder is strong. Local conservation laws characterizing an underlying MBL phase decay due to the coupling to phonons. We show that this decay can be compensated when the system is driven...

Full description

Saved in:
Bibliographic Details
Published inPhysical review letters Vol. 121; no. 26; p. 267603
Main Authors Lenarčič, Zala, Altman, Ehud, Rosch, Achim
Format Journal Article
LanguageEnglish
Published United States 28.12.2018
Online AccessGet more information

Cover

More Information
Summary:Because of the presence of phonons, many-body localization (MBL) does not occur in disordered solids, even if disorder is strong. Local conservation laws characterizing an underlying MBL phase decay due to the coupling to phonons. We show that this decay can be compensated when the system is driven out of equilibrium. The resulting variations of the local temperature provide characteristic fingerprints of an underlying MBL phase. We consider a one-dimensional disordered spin chain, which is weakly coupled to a phonon bath and weakly irradiated by white light. The irradiation has weak effects in the ergodic phase. However, if the system is in the MBL phase, irradiation induces strong temperature variations despite the coupling to phonons. Temperature variations can be used similar to an order parameter to detect MBL phases, the phase transition, and a MBL correlation length.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.121.267603