Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/98895
Title: Stability of quantum motion: A semiclassical approach
Authors: Wang, W.-G. 
Li, B. 
Keywords: Chaotic motion
Fidelity
Regular motion
Issue Date: 30-Sep-2007
Citation: Wang, W.-G.,Li, B. (2007-09-30). Stability of quantum motion: A semiclassical approach. International Journal of Modern Physics B 21 (23-24) : 4280-4283. ScholarBank@NUS Repository.
Abstract: A semiclassical theory is used for the study of fidelity. For systems with weak chaos in the classical limit, we show that the fidelity has a non-Fermi-Golden-Rule decay, which can be explained by the closeness of the distribution of action difference in the semiclassical theory to the Levy distribution. For systems with strong chaos in the classical limit, we present a semiclassical expression for fidelity decay in the Lyapunov regime, which is more general than the previously predicted Lyapunov decay and λ1 decay of fidelity. For systems with regular motion in the classical limit, we derive the fidelity decay for initial narrow Gaussian wavepackets, which displays a quite complex behaviour, from Gaussian to power law decay t-α with 1 ≤ α ≤ 2. © World Scientific Publishing Company.
Source Title: International Journal of Modern Physics B
URI: http://scholarbank.nus.edu.sg/handle/10635/98895
ISSN: 02179792
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

30
checked on Dec 7, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.