Energy-dependent dynamical quantum phase transitions in quasicrystals

Recently the role of the mobility edge in localization transitions has been extensively studied for one-dimensional tight-binding quasiperiodic models. In this work we study the mobility edge in a family of quasiperiodic systems evolving far from equilibrium, such as quench dynamics. We report numerical simulations of the Loschmidt echo based on a polynomial expansion-based technique with a moderate computational cost. Remarkably, we obtain an identical energy dependence on the equilibrium and dynamical quantum phase transitions of quasiperiodic models. The self-dual energy-independent localization model under quench dynamics exhibits energy-independent dynamical quantum phase transitions. On the other hand, self-dual energy-dependent localization models undergo energy-dependent dynamical quantum phase transitions. The results provide insights into energy-dependent dynamical localization transitions in quasiperiodic systems relevant to experiments.