Temperature dependent properties of the
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S.N. Martynov; A.F. Sadreev
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Article
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1978
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Elsevier Science
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English
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A system of two-level atoms interacting with one mode of a quantized radiation field i\ considered by the quantum field theory. The existence of a phase transition to the spontaneous coherent state (SCS) is shown. This state arises from the Bose-Einstein condensation of the photons of the radiation