On anomalous diffusion and the out of equilibrium response function in one-dimensional models (Articolo in rivista)

Type
Label
  • On anomalous diffusion and the out of equilibrium response function in one-dimensional models (Articolo in rivista) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1088/1742-5468/2011/01/L01002 (literal)
Alternative label
  • D. Villamaina; A. Sarracino; G. Gradenigo; A. Puglisi; A. Vulpiani (2011)
    On anomalous diffusion and the out of equilibrium response function in one-dimensional models
    in Journal of statistical mechanics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • D. Villamaina; A. Sarracino; G. Gradenigo; A. Puglisi; A. Vulpiani (literal)
Pagina inizio
  • L01002 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://iopscience.iop.org/1742-5468/2011/01/L01002/ (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 2011 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • January (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ISC and Dipartimento di Fisica, Università Sapienza--Piazzale Aldo Moro 2, 00185, Roma, Italy (literal)
Titolo
  • On anomalous diffusion and the out of equilibrium response function in one-dimensional models (literal)
Abstract
  • We study how the Einstein relation between spontaneous fluctuations and the response to an external perturbation holds in the absence of currents, for the comb model and the elastic single-file, which are examples of systems with subdiffusive transport properties. The relevance of non-equilibrium conditions is investigated: when a stationary current (in the form of a drift or an energy flux) is present, the Einstein relation breaks down, as is known to happen in systems with standard diffusion. In the case of the comb model, a general relation, which has appeared in the recent literature, between the response function and an unperturbed suitable correlation function, allows us to explain the observed results. This suggests that a relevant ingredient in breaking the Einstein formula, for stationary regimes, is not the anomalous diffusion but the presence of currents driving the system out of equilibrium. (literal)
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