Abstract
We study the thermal conductivity of the one dimensional Toda lattice perturbed by a stochastic dynamics preserving energy and momentum. The strength of the stochastic noise is controlled by a parameter γ. We show that heat transport is anomalous, and that the thermal conductivity diverges with the length n of the chain according to κ(n)∼n α, with 0<α≤1/2. In particular, the ballistic heat conduction of the unperturbed Toda chain is destroyed. Besides, the exponent α of the divergence depends on γ.
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Iacobucci, A., Legoll, F., Olla, S. et al. Thermal Conductivity of the Toda Lattice with Conservative Noise. J Stat Phys 140, 336–348 (2010). https://doi.org/10.1007/s10955-010-9996-6
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DOI: https://doi.org/10.1007/s10955-010-9996-6