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题名: Coulomb Friction Driving Brownian Motors
作者: Manacorda, A ;  Puglisi, A ;  Sarracino, A
刊名: COMMUNICATIONS IN THEORETICAL PHYSICS
出版日期: 2014
卷号: 62, 期号:4, 页码:505-513
关键词: DRY FRICTION ;  MOTION ;  PARTICLES ;  RATCHETS ;  EQUATION
学科分类: Physics
通讯作者: Manacorda, A (reprint author), Univ Roma La Sapienza, Dipartimento Fis, P A Moro 2, I-00185 Rome, Italy.
部门归属: [Manacorda, Alessandro ;  Puglisi, Andrea ;  Sarracino, Alessandro] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy ;  [Puglisi, Andrea ;  Sarracino, Alessandro] Univ Roma La Sapienza, Ist Sistemi Complessi, CNR, I-00185 Rome, Italy ;  [Puglisi, Andrea ;  Sarracino, Alessandro] Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China ;  [Sarracino, Alessandro] Univ Paris 06, CNRS UMR 7600, Lab Phys Theor Matiere Condensee, F-75255 Paris, France
英文摘要: We review a family of models recently introduced to describe Brownian motors under the influence of Coulomb friction, or more general non-linear friction laws. It is known that, if the heat bath is modeled as the usual Langevin equation (linear viscosity plus white noise), additional non-linear friction forces are not sufficient to break detailed balance, i.e. cannot produce a motor effect. We discuss two possibile mechanisms to elude this problem. A first possibility, exploited in several models inspired to recent experiments, is to replace the heat bath's white noise by a "collisional noise", that is the effect of random collisions with an external equilibrium gas of particles. A second possibility is enlarging the phase space, e.g. by adding an external potential which couples velocity to position, as in a Klein Kramers equation. In both cases, non-linear friction becomes sufficient to achieve a non-equilibrium steady state and, in the presence of an even small spatial asymmetry, a motor effect is produced.
资助者: Granular-Chaos project - Italian MIUR under the FIRB-IDEAS [RBID08Z9JE]
收录类别: SCI
语种: 英语
WOS记录号: WOS:000345826400008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15634
Appears in Collections:理论物理所2014年知识产出 _期刊论文

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Recommended Citation:
Manacorda, A,Puglisi, A,Sarracino, A. Coulomb Friction Driving Brownian Motors[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2014,62(4):505-513.
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