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quant-ph2011★ 91 cited
Exact infinite-time statistics of the Loschmidt echo for a quantum quench
Lorenzo Campos Venuti, N. Tobias Jacobson, Siddhartha Santra +1
The equilibration dynamics of a closed quantum system is encoded in the long-time distribution function of generic observables. In this paper we consider the Loschmidt echo general…
quant-ph2008★ 68 cited
Fidelity approach to the disordered quantum XY model
Silvano Garnerone, N. Tobias Jacobson, Stephan Haas +1
We study the random XY spin chain in a transverse field by analyzing the susceptibility of the ground state fidelity, numerically evaluated through a standard mapping of the model…