Lefevere, R.
Schenkel, A
We compute the first-order correction to the correlation functions of the stationary state of a stochastically forced harmonic chain out of equilibrium when a small on-site anharmonic potential is added. This is achieved by deriving a suitable formula for the covariance matrix of the invariant state. We find that the first-order correction of the heat current does not depend on the size of the system. Second, the temperature profile is linear when the harmonic part of the on-site potential is zero. The sign of the gradient of the profile, however, is opposite to the sign of the temperature difference of the two heat baths.
Bibliographic reference |
Lefevere, R. ; Schenkel, A. Perturbative analysis of anharmonic chains of oscillators out of equilibrium. In: Journal of Statistical Physics, Vol. 115, no. 5-6, p. 1389-1421 (2004) |
Permanent URL |
http://hdl.handle.net/2078.1/40192 |