03-34 Taku Matsui and Yoshiko Ogata
Variational Principle for Non-Equilibrium Steady States of the XX Model (376K, Postscript) Feb 1, 03
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Abstract. We show that non-equilibrium steady states of the one dimensional exactly solved XY model can be characterized by the variational principle of free energy of a long range interaction and that they cannot be a KMS state for any C$^*$-dynamical system.

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