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quant-ph2022★ 13 cited
Metamorphic dynamical quantum phase transition in double-quench processes at finite temperatures
Xu-Yang Hou, Qu-Cheng Gao, Hao Guo +1
By deriving a general framework and analyzing concrete examples, we demonstrate a class of dynamical quantum phase transitions (DQPTs) in one-dimensional two-band systems going thr…
quant-ph2020★ 32 cited
Ubiquity of zeros of Loschmidt amplitude for mixed states in different physical processes and their implications
Xu-Yang Hou, Qu-Cheng Gao, Hao Guo +3
The Loschmidt amplitude of the purified states of mixed-state density matrices is shown to have zeros when the system undergoes a quasistatic, quench, or Uhlmann process. While the…