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题名: Rocked quantum periodic systems in the presence of coordinate-dependent friction
作者: Bao, JD ;  Abe, Y ;  Zhuo, YZ
刊名: PHYSICAL REVIEW E
出版日期: 1998
卷号: 58, 期号:3, 页码:2931-2937
关键词: ACTIVATED RATE-PROCESSES ;  INDUCED TRANSPORT ;  NOISE ;  RATCHETS ;  STATE
学科分类: Physics
通讯作者: Bao, JD , Beijing Meteorol Coll, Beijing 100081, Peoples R China.
部门归属: Beijing Meteorol Coll, Beijing 100081, Peoples R China; CCAST, World Lab, Beijing 100080, Peoples R China; Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 606, Japan; Inst Atom Energy, Beijing 102413, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We study rocked periodic systems with quantum fluctuations and coordinate-dependent friction. The steady current along the direction of the external driving force is evaluated numerically in terms of the path-integral Monte Carlo method and discussed in terms of the steepest descent approximation. Above the crossover temperature T-c a classical-like distribution function is given in order to calculate the least nonvanishing eigenvalue of the Fokker-Planck equation, thus one can finally obtain an expression of the current for moderate-to-strong damping. The influence of nonlinear quantum dissipation on the magnitude and the direction of the average current is observed. The classical current is also calculated using the Langevin simulation. The results show that when the friction is a periodic function of the coordinate, a net current averaging over the two directions arises even in the absence of both spatial and time asymmetry.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000076011200042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/12272
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Bao, JD,Abe, Y,Zhuo, YZ. Rocked quantum periodic systems in the presence of coordinate-dependent friction[J]. PHYSICAL REVIEW E,1998,58(3):2931-2937.
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