arXiv subjects

Hong Zhao

Publications and source records attributed to Hong Zhao.

93 records · Page 6Linked to original sources

arXiv2001

Reply to Dhar's comment on "Can disorder induce a finite thermal conductivity in 1D lattices"

In his comment, Dhar (cond-mat/0106349) claims that the existence and uniqueness of a nonequilibrium stationary state has been proved by Lebowitz et al. We should point out that our observation does not contradict the proof. They have only proved that when a (mass) disordered harmonic chain is placed in contact with stochastic reservoirs of the Langevin type, a nonequilibrium stationary state can be reached. However, they didn't prove the existence and uniqueness of the nonequilibrium stationary state for the general case, namely, when the chain is in contact with general thermostated reservoirs (see Bonneto et al. math-ph/0002052).

cond-mat.stat-mech↗

arXiv2000

Heat conduction in one dimensional nonintegrable systems

Two classes of 1D nonintegrable systems represented by the Fermi-Pasta-Ulam (FPU) model and the discrete $ϕ^4$ model are studied to seek a generic mechanism of energy transport in microscopic level sustaining macroscopic behaviors. The results enable us to understand why the class represented by the $ϕ^4$ model has a normal thermal conductivity and the class represented by the FPU model does not even though the temperature gradient can be established.

cond-mat↗

arXiv1997

Heat conduction in one dimensional chains

We study numerically the thermal conductivity in several different one dimensional chains. We show that the phonon-lattice interaction is the main ingredient of the Fourier heat law. Our argument provides a rather satisfactory explanation to all existing numerical results concerning this problem.

cond-mat.stat-mech↗