Fate of the one-particle-density-matrix occupation spectrum of many-body localized states after a global quench

  title={Fate of the one-particle-density-matrix occupation spectrum of many-body localized states after a global quench},
  author={Tal{\'i}a L. M. Lezama and Soumya Bera and Henning Schomerus and Fabian Heidrich-Meisner and Jens H. Bardarson},
The emergent integrability of the many-body localized phase is naturally understood in terms of localized quasiparticles. As a result, the occupations of the one-particle density matrix in eigenstates show a Fermi-liquid like discontinuity. Here we show that in the steady state reached at long times after a global quench from a perfect density-wave state, this occupation discontinuity is absent, which is reminiscent of a Fermi liquid at a finite temperature, while the full occupation function… 

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