Quantum Irreversibility of Energy Spreading

Details Quantum Irreversibility of Energy Spreading Quantum Irreversibility of Energy Spreading

2002-01-10

arxiv.org/abs/cond-mat/0201148v3

Europhysics Letters 61, 431-437 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 3 figures, published EPL format

Scientific paper

10.1209/epl/i2003-00325-6

The analysis of dissipation and dephasing in driven mesoscopic devices requires a distinction between two notions of quantum irreversibility. One ("Loschmidt echo") is related to "time reversal", while the other is related to "driving reversal". In the latter context the time of maximum return (compensation) should substitute the inappropriate notion of "echo" time. Non-perturbative features manifest themselves in the energy spreading process. This is demonstrated for the prototype random-matrix Wigner model, where the compensation time and the system response exhibit a non-universal scaling behavior.

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