We investigate the propagation of temperature perturbations in an array of coupled nonlinear oscillators at finite temperature. We evaluate the response function at equilibrium and show how the memory effects affect the diffusion properties. A comparison with nonequilibrium simulations reveals that the telegraph equation provides a reliable interpretative paradigm for describing quantitatively the propagation of a heat pulse at the macroscopic level. The results could be of help in understanding and modeling energy transport in individual nanotubes. © 2009 The American Physical Society.
Heat wave propagation in a nonlinear chain / Piazza, F.; Lepri, S.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - ELETTRONICO. - 79:(2009), pp. 094306-094306. [10.1103/PhysRevB.79.094306]
Heat wave propagation in a nonlinear chain
Piazza, F.
;Lepri, S.
2009
Abstract
We investigate the propagation of temperature perturbations in an array of coupled nonlinear oscillators at finite temperature. We evaluate the response function at equilibrium and show how the memory effects affect the diffusion properties. A comparison with nonequilibrium simulations reveals that the telegraph equation provides a reliable interpretative paradigm for describing quantitatively the propagation of a heat pulse at the macroscopic level. The results could be of help in understanding and modeling energy transport in individual nanotubes. © 2009 The American Physical Society.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.