Rights statement: ©2017 American Physical Society
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Rights statement: ©2017 American Physical Society
Final published version, 365 KB, PDF document
Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - One-particle density matrix occupation spectrum of many-body localized states after a global quench
AU - Lezama, Talía L. M.
AU - Bera, Soumya
AU - Schomerus, Henning Ulrich
AU - Heidrich-Meisner, Fabian
AU - Bardarson, Jens H.
N1 - ©2017 American Physical Society
PY - 2017/8/23
Y1 - 2017/8/23
N2 - 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, reminiscent of a Fermi liquid at a finite temperature, while the full occupation function remains strongly nonthermal. We discuss how one can understand this as a consequence of the local structure of the density-wave state and the resulting partial occupation of quasiparticles. This partial occupation can be controlled by tuning the initial state and can be described by an effective temperature.
AB - 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, reminiscent of a Fermi liquid at a finite temperature, while the full occupation function remains strongly nonthermal. We discuss how one can understand this as a consequence of the local structure of the density-wave state and the resulting partial occupation of quasiparticles. This partial occupation can be controlled by tuning the initial state and can be described by an effective temperature.
U2 - 10.1103/PhysRevB.96.060202
DO - 10.1103/PhysRevB.96.060202
M3 - Journal article
VL - 96
JO - Physical review B
JF - Physical review B
SN - 2469-9950
IS - 6
M1 - 060202(R)
ER -