Non-equilibrium fluctuations in a driven stochastic Lorentz gas (Articolo in rivista)

Type
Label
  • Non-equilibrium fluctuations in a driven stochastic Lorentz gas (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevE.85.031112 (literal)
Alternative label
  • G. Gradenigo (1); U. Marini Bettolo Marconi (2); A. Puglisi (1); A. Sarracino (1) (2012)
    Non-equilibrium fluctuations in a driven stochastic Lorentz gas
    in Physical review. E, Statistical, nonlinear, and soft matter physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • G. Gradenigo (1); U. Marini Bettolo Marconi (2); A. Puglisi (1); A. Sarracino (1) (literal)
Pagina inizio
  • 031112 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://pre.aps.org/abstract/PRE/v85/i3/e031112 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 85 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 3 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) CNR-ISC and Dipartimento di Fisica, Università Sapienza, Piazzale Aldo Moro 2, 00185 Roma, Italy 2) Scuola di Scienze e Tecnologie, Università di Camerino, 62032 Camerino, Italy (literal)
Titolo
  • Non-equilibrium fluctuations in a driven stochastic Lorentz gas (literal)
Abstract
  • We study the stationary state of a one-dimensional kinetic model where a probe particle is driven by an external field epsilon and collides, elastically or inelastically, with a bath of particles at temperature T. We focus on the stationary distribution of the velocity of the particle, and of two estimates of the total entropy production Delta s(tot). One is the entropy production of the medium Delta s(m), which is equal to the energy exchanged with the scatterers, divided by a parameter theta, coinciding with the particle temperature at epsilon = 0. The other is the work W done by the external field, again rescaled by theta. At small epsilon, a good collapse of the two distributions is found: in this case, the two quantities also verify the fluctuation relation (FR), indicating that both are good approximations of Delta s(tot). Differently, for large values of epsilon, the fluctuations of W violate the FR, while Delta s(m) still verifies it. (literal)
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