62 citations · 124 across the 8 of their papers we have counts for
4 papers · 1 filter
Complexity and instability of quantum motion near a quantum phase transition
Pinquan Qin, Wen-ge Wang, Giuliano Benenti +1
We show that the number of harmonics of the Wigner function, recently proposed as a measure of quantum complexity, can be also used to characterize quantum phase transitions. The n…
Semiclassical approach to the quantum Loschmidt echo in deep quantum regions: from validity to breakdown
Pinquan Qin, Qian Wang, Wen-ge Wang
Semiclassical results are usually expected to be valid in the semiclassical regime. An interesting question is, in models in which appropriate effective Planck constants can be int…
Scaling behavior for a class of quantum phase transitions
Wen-ge Wang, Pinquan Qin, Qian Wang +2
We show that for quantum phase transitions with a single bosonic zero mode at the critical point, like the Dicke model and the Lipkin-Meshkov-Glick model, metric quantities such as…
Semiclassical Approach to Survival Probability at Quantum Phase Transitions
Wen-ge Wang, Pinquan Qin, Lewei He +1
We study the decay of survival probability at quantum phase transitions (QPT). The semiclassical theory is found applicable in the vicinities of critical points with infinite degen…