Jacquod, P. and Adagideli, Inanc and Beenakker, C. (2003) Anomalous power law of quantum reversibility for classically regular dynamics. Europhysics Letters 61, pp. 729-735.
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The Loschmidt Echo M(t) (defined as the squared overlap of wave packets evolving with two slightly different Hamiltonians) is a measure of quantum reversibility. We investigate its behavior for classically quasi-integrable systems. A dominant regime emerges where M(t) t^ with alpha=3d/2 depending solely on the dimension d of the system. This power law decay is faster than the result t^ for the decay of classical phase space densities.
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|Subjects:||500 Science > 530 Physics|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||20 Mar 2007|
|Last Modified:||16 Jan 2015 09:11|