The “harmonic liquid” away from equilibrium

J. Bafaluy and J.M. Rubí

Physica A: Statistical Mechanics and its Applications, 1988, vol. 153, issue 1, 129-146

Abstract: Some aspects of the linear chain of harmonic oscillators (“harmonic liquid”) are studied. In particular we compute the stationary correlation functions of coordinates and momenta of the oscillators for a particular non-equilibrium steady state. We find that the coordinates and momenta autocorrelation functions are analogous to their equilibrium counterparts whereas the coordinates-momenta correlation functions exhibit long-range behaviour due to time reversal symmetry breaking. The non-equilibrium entropy of the chain is also computed. It contains a non-equilibrium part that depends on the temperature of the external sources and on the stationary temperature. A comparison with a non-equilibrium entropy obtained from information theory is made.

Date: 1988
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:153:y:1988:i:1:p:129-146

DOI: 10.1016/0378-4371(88)90107-0

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