Heat conduction in chains of nonlinear oscillators

Year: 1997

Authors: Lepri S., Livi R., Politi A.

Autors Affiliation: Istituto Nazionale di Fisica della Materia, 50125 Firenze, Italy;
Istituto Nazionale di Fisica Nucleare, 50125 Firenze, Italy;
Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy;
Dipartimento di Fisica, Universitá di Bologna, 40127 Bologna, Italt;
Istituto Nazionale di Fisica Nucleare, 40127 Bologna, Italy;

Abstract: We numerically study heat conduction in chains of nonlinear oscillators with time-reversible thermostats. A nontrivial temperature profile is found to set in, which obeys a simple scaling relation for increasing the number N of particles. The thermal conductivity diverges approximately as N-1/2, indicating that chaotic behavior is not enough to ensure the Fourier law. Finally, we show that the microscopic dynamics ensures fulfillment of a macroscopic balance equation for the entropy production.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 78 (10)      Pages from: 1896  to: 1899

KeyWords: Thermal-conductivity; Dynamical Ensembles; Equilibrium; States
DOI: 10.1103/PhysRevLett.78.1896

Citations: 438
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