Issue |
Europhys. Lett.
Volume 61, Number 6, March 2003
|
|
---|---|---|
Page(s) | 729 - 735 | |
Section | General | |
DOI | https://doi.org/10.1209/epl/i2003-00289-y | |
Published online | 01 March 2003 |
Anomalous power law of quantum reversibility for classically regular dynamics
Instituut-Lorentz, Universiteit Leiden - P.O. Box 9506 2300 RA Leiden, The Netherlands
Received:
7
November
2002
Accepted:
16
January
2003
The Loschmidt Echo (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
with
depending
solely on the dimension d of the system. This power law decay
is faster than the result
for the decay of the
overlap of classical phase space densities.
PACS: 05.45.Mt – Semiclassical chaos (“quantum chaos”) / 05.45.Pq – Numerical simulations of chaotic models / 03.65.Yz – Decoherence; open systems; quantum statistical methods
© EDP Sciences, 2003
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