On quantum systems in thermal contact |
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Authors: | H. Roos |
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Affiliation: | (1) Institut für Theoretische Physik der Universität Göttingen, Germany |
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Abstract: | It is shown that under rather general conditions two K.M.S. states 1 and 2 of systemsS1 andS2, respectively, can be simultaneously extended to a K.M.S. state of a system composed ofS1 andS2, provided both systems have equal temperatures. This result gives further support to the conjecture that K.M.S. states are equilibrium states. In the second part, a model of thermal coupling is constructed which satisfies the assumptions of the first part, thereby showing that the result is also valid in the interesting case of systemsS1 andS2 in thermal contact. |
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