| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Diffusion dynamics in external noise-activated non-equilibrium open system reservoir coupling environment |
| Wang Chun-Yang (王春阳) |
| College of Physics and Engineering, Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Qufu Normal University, Qufu 273165, China |
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Abstract The diffusion process in an external noise-activated non-equilibrium open system-reservoir coupling environment is studied by analytically solving the generalized Langevin equation. The dynamical property of the system near the barrier top is investigated in detail by numerically calculating the quantities such as mean diffusion path, invariance, barrier passing probability, and so on. It is found that, comparing with the unfavorable effect of internal fluctuations, the external noise activation is sometimes beneficial to the diffusion process. An optimal strength of external activation or correlation time of the internal fluctuation is expected for the diffusing particle to have a maximal probability to escape from the potential well.
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Received: 22 September 2012
Revised: 22 January 2013
Accepted manuscript online:
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PACS:
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47.70.-n
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(Reactive and radiative flows)
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82.20.Db
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(Transition state theory and statistical theories of rate constants)
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82.60.-s
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(Chemical thermodynamics)
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05.60.Cd
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(Classical transport)
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| Fund: Project supported by the Natural Science Foundation for Youths of Shandong Province, China (Grant No. ZR2011AQ016) and the Postdoctoral Innovation
Program Foundation of Shandong Province, China (Grant No. 201002015). |
Corresponding Authors:
Wang Chun-Yang
E-mail: wchy@mail.bnu.edu.cn
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Cite this article:
Wang Chun-Yang (王春阳) Diffusion dynamics in external noise-activated non-equilibrium open system reservoir coupling environment 2013 Chin. Phys. B 22 074706
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