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→Derivation for systems described by the canonical ensemble
===Derivation for systems described by the canonical ensemble===
===Derivation for systems described by the canonical ensemble===
正则系综系统的推导
If a system is in thermal contact with a heat bath at some temperature T then, in equilibrium, the probability distribution over the energy eigenvalues are given by the [[canonical ensemble]]:
If a system is in thermal contact with a heat bath at some temperature T then, in equilibrium, the probability distribution over the energy eigenvalues are given by the [[canonical ensemble]]: