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Number of results

Journal

2011 | 9 | 1 | 198-204

Article title

Dynamical properties of an asymmetric bistable system with quantum fluctuations in the strong-friction limit

Content

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Languages of publication

EN

Abstracts

EN
The dynamical properties of an overdamped Brownian particle moving in an asymmetric bistable system with quantum fluctuations are investigated. Within the strong-friction limit (the quantum Smoluchowski regime), the analytic expression for the relaxation time of the system is derived by means of the projection-operator method, in which the effects of the memory kernels are taken into account. Based on the relaxation time, we consider both the overdamped quantum case and its classical counterpart.In these contexts, the effects of the quantum fluctuations and the asymmetry of the potential are discussed. It is found that: (i) The quantum effects in an asymmetric bistable system on time scales of the relaxation process are more prominent for lower temperatures and smaller asymmetries of the potential. (ii) The quantum effects speed up the rate of fluctuation decay of the state-space variable for lower temperatures. (iii) The asymmetry of the potential first slows down the rate of fluctuation decay of the state-space variable and then increases it.

Publisher

Journal

Year

Volume

9

Issue

1

Pages

198-204

Physical description

Dates

published
1 - 2 - 2011
online
24 - 9 - 2010

Contributors

author
  • Faculty of Science, Kunming University of Science and Technology, Kunming, 650093, China
author
  • Faculty of Science, Kunming University of Science and Technology, Kunming, 650093, China
author
  • Department of Physics, Yunnan University, Kunming, 650091, China

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Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.-psjd-doi-10_2478_s11534-010-0041-9
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