Anomalous transport and relaxation in classical one-dimensional models View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2007-12

AUTHORS

G. Basile, L. Delfini, S. Lepri, R. Livi, S. Olla, A. Politi

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 κ(L) ∼Lα 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 α 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. More... »

PAGES

85-93

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1140/epjst/e2007-00364-7

DOI

http://dx.doi.org/10.1140/epjst/e2007-00364-7

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1013260415


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