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Measurement phase transitions in the no-click limit as quantum phase transitions of a non-hermitean vacuum

Zerba, C.
•
Silva, A.
2023
  • journal article

Periodico
SCIPOST PHYSICS CORE
Abstract
We study dynamical phase transitions occurring in the stationary state of the dynamics of integrable many-body non-hermitian Hamiltonians, which can be either realized as a no-click limit of a stochastic Schrodinger equation or using spacetime duality of quantum circuits. In two specific models, the Transverse Field Ising Chain and the Long Range Kitaev Chain, we observe that the entanglement phase transitions occurring in the stationary state have the same nature as that occurring in the vacuum of the nonhermitian Hamiltonian: bounded entanglement entropy when the imaginary part of the quasi-particle spectrum is gapped and a logarithmic growth for gapless imaginary spectrum. This observation suggests the possibility to generalize the area-law theorem to non-Hermitian Hamiltonians.
DOI
10.21468/SciPostPhysCore.6.3.051
WOS
WOS:001033558200001
Archivio
https://hdl.handle.net/20.500.11767/139290
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85168683620
https://arxiv.org/abs/2301.07383
Diritti
open access
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