Anomalous transport and relaxation in classical one-dimensional models (Articolo in rivista)

Type
Label
  • Anomalous transport and relaxation in classical one-dimensional models (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Basile G.; Delfini L.; Lepri S.; Livi R.; Olla S.; Politi A. (2007)
    Anomalous transport and relaxation in classical one-dimensional models
    in The European physical journal. Special topics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Basile G.; Delfini L.; Lepri S.; Livi R.; Olla S.; Politi A. (literal)
Pagina inizio
  • 85 (literal)
Pagina fine
  • 93 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 151 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ Florence, Dipartimento Matemat, I-50134 Florence, Italy; CNR, Ist Sistemi Complessi, I-50019 Sesto Fiorentino, Italy; Dipartimento Fis, I-50019 Sesto Fiorentino, Italy; Univ Paris 09, CNRS, UMR 7534, Ceremade, F-75775 Paris 16, France; Ist Nazl Fis Nucl, I-50125 Florence, Italy; Ist Nazl Fis Mat, Florence, Italy (literal)
Titolo
  • Anomalous transport and relaxation in classical one-dimensional models (literal)
Abstract
  • After reviewing the main features of anomalous energy transport in 1D systems, we report simulations performed with chains of noisy anharmonic oscillators. The stochastic terms are added in such a way to conserve total energy and momentum, thus keeping the basic hydrodynamic features of these models. The addition of this 'conservative noise' allows to obtain a more efficient estimate of the power-law divergence of heat conductivity k(L) similar to L-alpha in the limit of small noise and large system size L. By comparing the numerical results with rigorous predictions obtained for the harmonic chain, we show how finite-size and time effects can be effectively controlled. For low noise amplitudes, the a values are close to 1/3 for asymmetric potentials and to 0.4 for symmetric ones. These results support the previously conjectured two-universality-classes scenario. (literal)
Prodotto di
Autore CNR

Incoming links:


Autore CNR di
Prodotto
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it