Anomalous transport and relaxation in classical one-dimensional models
| dc.creator | Basile, G. | |
| dc.creator | Delfini, L. | |
| dc.creator | Lepri, S. | |
| dc.creator | Livi, R. | |
| dc.creator | Olla, S. | |
| dc.creator | Politi, A. | |
| dc.date | 2008-01-24 | |
| dc.date.accessioned | 2026-07-07T08:56:13Z | |
| dc.date.available | 2026-07-07T08:56:13Z | |
| dc.description | 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 kappa(L) ~ 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 alpha 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. | |
| dc.identifier | https://arxiv.org/abs/0801.3789 | |
| dc.identifier | http://arxiv.org/abs/0801.3789 | |
| dc.identifier | Eur. Phys. J. Special Topics. vol. 151 pag. 85-93 (2007) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/146532 | |
| dc.subject | Statistical Mechanics | |
| dc.title | Anomalous transport and relaxation in classical one-dimensional models | |
| dc.type | text |