most citedCharacterizing the excited-state quantum phase transition via the dynamical and statistical properties of the diagonal entropy

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quant-ph2020★ 14 cited

Characterizing the excited-state quantum phase transition via the dynamical and statistical properties of the diagonal entropy

Qian Wang, Francisco Pérez-Bernal

Using the diagonal entropy, we analyze the dynamical signatures of the Lipkin-Meshkov-Glick (LMG) model excited-state quantum phase transition (ESQPT). We first show that the time…