Fluctuations in partitioning systems with few degrees of freedom (Articolo in rivista)

Type
Label
  • Fluctuations in partitioning systems with few degrees of freedom (Articolo in rivista) (literal)
Anno
  • 2014-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevE.89.042105 (literal)
Alternative label
  • L. Cerino (1); G. Gradenigo (2,3); A. Sarracino (4,5,6); D. Villamaina (6); A. Vulpiani (1,4,5) (2014)
    Fluctuations in partitioning systems with few degrees of freedom
    in Physical review. E, Statistical, nonlinear, and soft matter physics (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • L. Cerino (1); G. Gradenigo (2,3); A. Sarracino (4,5,6); D. Villamaina (6); A. Vulpiani (1,4,5) (literal)
Pagina inizio
  • 042105 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://journals.aps.org/pre/abstract/10.1103/PhysRevE.89.042105 (literal)
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  • 89 (literal)
Rivista
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  • 9 (literal)
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  • 4 (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) Dipartimento di Fisica, Università di Roma Sapienza, Piazzale A. Moro 2, 00185 Roma, Italy (2) CEA, DSM, CNRS, F-91191 Gif-sur-Yvette cedex, France (3) Université Paris-Sud, CNRS, UMR No. 8626, Orsay 91405, France (4) ISC-CNR, Dipartimento di Fisica, Università Sapienza, Piazzale A. Moro 2, 00185 Roma, Italy (5) Kavli Institute for Theoretical Physics China, CAS, Beijing 100190, China (6) Laboratoire de Physique Théorique de la Matière Condensée, CNRS UMR No. 7600, Université Paris 6, Case Courrier 121, 4 Place Jussieu, 75255 Paris Cedex, France (7) Laboratoire de Physique Théorique de l'Ens, Institut de Physique Théorique Philippe Meyer, 24 Rue Lhomond, 75005 Paris, France (literal)
Titolo
  • Fluctuations in partitioning systems with few degrees of freedom (literal)
Abstract
  • We study the behavior of a moving wall in contact with a particle gas and subjected to an external force. We compare the fluctuations of the system observed in the microcanonical and canonical ensembles, by varying the number of particles. Static and dynamic correlations signal significant differences between the two ensembles. Furthermore, velocity-velocity correlations of the moving wall present a complex two-time relaxation that cannot be reproduced by a standard Langevin-like description. Quite remarkably, increasing the number of gas particles in an elongated geometry, we find a typical time scale, related to the interaction between the partitioning wall and the particles, which grows macroscopically. (literal)
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