Many-body localization in system with a completely delocalized single-particle spectrum

Yevgeny Bar Lev, David R. Reichman, Yoav Sagi

Research output: Contribution to journalArticlepeer-review

Abstract

Many-body localization (MBL) in a one-dimensional Fermi Hubbard model with random on-site interactions is studied. While for this model all single-particle states are trivially delocalized, it is shown that for sufficiently strong disordered interactions the model is many-body localized. It is therefore argued that MBL does not necessarily rely on localization of the single-particle spectrum. This model provides a convenient platform to study pure MBL phenomenology, since Anderson localization in this model does not exist. By examining various forms of the interaction term, a dramatic effect of symmetries on charge transport is demonstrated. A possible realization in a cold atom experiment is proposed.

Original languageAmerican English
Article number201116
JournalPhysical Review B
Volume94
Issue number20
DOIs
StatePublished - 21 Nov 2016

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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