Phase operator and phase transition in a
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J.P Provost; F Rocca; G Vallee
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Article
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1977
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Elsevier Science
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English
β 988 KB
We study the thermodynamical properties of a Dicke model with classical spins. As in the quantum case, the model exhibits a phase transition associated with the spontaneous breaking of the gauge symmetry. We calculate the thermodynamical equilibrium photon state in a relatively simple way both at an