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The “harmonic liquid” away from equilibrium

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  • Bafaluy, J.
  • Rubí, J.M.

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.

Suggested Citation

  • Bafaluy, J. & Rubí, J.M., 1988. "The “harmonic liquid” away from equilibrium," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 153(1), pages 129-146.
    • Handle: RePEc:eee:phsmap:v:153:y:1988:i:1:p:129-146
    DOI: 10.1016/0378-4371(88)90107-0
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