Dynamical singularity of the rate function for quench dynamics in finite-size quantum systems
Dynamical singularity of the rate function for quench dynamics in finite-size quantum systems
The dynamical quantum phase transition is characterized by the emergence of nonanalytic behaviors in the rate function, corresponding to the occurrence of exact zero points of the Loschmidt echo in the thermodynamical limit. In general, exact zeros of the Loschmidt echo are not accessible in a finite-size quantum system except …