Physics – Quantum Physics
Scientific paper
2010-06-30
Physics
Quantum Physics
8 pages, 9 figures
Scientific paper
We study the equilibration behavior following local quenches, using frustrated quantum spin chains as an example of interacting closed quantum systems. Specifically, we examine the statistics of the time series of the Loschmidt echo, the trace distance of the time-evolved local density matrix to its average state, and the local magnetization. Depending on the quench parameters, the equilibration statistics of these quantities show features of good or poor equilibration, indicated by Gaussian, exponential or bistable distribution functions. These universal functions provide valuable tools to characterize the various time-evolution responses and give insight into the plethora of equilibration phenomena in complex quantum systems.
Chancellor Nicholas
Diez Mathias
Haas Stephan
Venuti Lorenzo Campos
Zanardi Paolo
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