Zeros of Loschmidt echo in the presence of Anderson localization
Zeros of Loschmidt echo in the presence of Anderson localization
We study the Loschmidt echo and the dynamical free energy of the Anderson model after a quench of the disorder strength. If the initial state is extended and the eigenstates of the postquench Hamiltonian are strongly localized, we argue that the Loschmidt echo exhibits zeros periodically with the period $2\ensuremath{\pi}/D$, …