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Manacorda, A; Puglisi, A; Sarracino, A; Manacorda, A (reprint author), Univ Roma La Sapienza, Dipartimento Fis, P A Moro 2, I-00185 Rome, Italy.
Coulomb Friction Driving Brownian Motors
Source PublicationCOMMUNICATIONS IN THEORETICAL PHYSICS
Language英语
KeywordDry Friction Motion Particles Ratchets Equation
AbstractWe 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.
2014
ISSN0253-6102
Volume62Issue:4Pages:505-513
Subject AreaPhysics
Indexed BySCI
Funding OrganizationGranular-Chaos project - Italian MIUR under the FIRB-IDEAS [RBID08Z9JE] ; Granular-Chaos project - Italian MIUR under the FIRB-IDEAS [RBID08Z9JE] ; Granular-Chaos project - Italian MIUR under the FIRB-IDEAS [RBID08Z9JE] ; Granular-Chaos project - Italian MIUR under the FIRB-IDEAS [RBID08Z9JE]
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/15634
Collection理论物理所科研产出_SCI论文
Corresponding AuthorManacorda, A (reprint author), Univ Roma La Sapienza, Dipartimento Fis, P A Moro 2, I-00185 Rome, Italy.
Recommended Citation
GB/T 7714
Manacorda, A,Puglisi, A,Sarracino, A,et al. Coulomb Friction Driving Brownian Motors[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2014,62(4):505-513.
APA Manacorda, A,Puglisi, A,Sarracino, A,&Manacorda, A .(2014).Coulomb Friction Driving Brownian Motors.COMMUNICATIONS IN THEORETICAL PHYSICS,62(4),505-513.
MLA Manacorda, A,et al."Coulomb Friction Driving Brownian Motors".COMMUNICATIONS IN THEORETICAL PHYSICS 62.4(2014):505-513.
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