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Entanglement phase transitions in non-Hermitian quasicrystals | | Longwen Zhou
; | | Date: |
2 Sep 2023 | | Abstract: | The scaling law of entanglement entropy could undergo qualitative changes
during the nonunitary evolution of a quantum many-body system. In this work, we
uncover such entanglement phase transitions in one-dimensional non-Hermitian
quasicrystals (NHQCs). We identify two types of entanglement transitions with
different scaling laws and critical behaviors due to the interplay between
non-Hermitian effects and quasiperiodic potentials. The first type represents a
typical volume-law to area-law transition, which happens together with a
PT-symmetry breaking and a localization transition. The second type features an
abnormal log-law to area-law transition, which is mediated by a critical phase
with a volume-law scaling in the steady-state entanglement entropy. These
entangling phases and transitions are demonstrated in two representative models
of NHQCs. Our results thus advanced the study of entanglement transitions in
non-Hermitian disordered systems and further disclosed the rich entanglement
patterns in NHQCs. | | Source: | arXiv, 2309.00924 | | Services: | Forum | Review | PDF | Favorites | |
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