Heat conduction in 2d nonlinear lattices

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dc.creatorLippi, A.
dc.creatorLivi, R.
dc.date1999-10-26
dc.date.accessioned2026-07-07T02:36:02Z
dc.date.available2026-07-07T02:36:02Z
dc.descriptionThe divergence of the heat conductivity in the thermodynamic limit is investigated in 2d-lattice models of anharmonic solids with nearest-neighbour interaction from single-well potentials. Two different numerical approaches based on nonequilibrium and equilibrium simulations provide consistent indications in favour of a logarithmic divergence in "ergodic", i.e. highly chaotic, dynamical regimes. Analytical estimates obtained in the framework of linear-response theory confirm this finding, while tracing back the physical origin of this {\sl anomalous} transport to the slow diffusion of the energy of long-wavelength effective Fourier modes. Finally, numerical evidence of {\sl superanomalous} transport is given in the weakly chaotic regime, typically found below some energy density threshold.
dc.description21 pages, 8 postscript figures
dc.identifierhttps://arxiv.org/abs/chao-dyn/9910034
dc.identifierhttp://arxiv.org/abs/chao-dyn/9910034
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/15776
dc.subjectChaotic Dynamics
dc.titleHeat conduction in 2d nonlinear lattices
dc.typetext

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