Journal de Physique I

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DOI: 10.1051/jp1:1993177
J. Phys. I France 3 (1993) 957-967

Fluctuation theory for an equilibrium superradiant model

Maria Trache

Laboratoire Aimé Cotton, CNRS II, Bât. 505, Campus d'Orsay, 91405 Orsay Cedex, France

(Received 19 August 1992, accepted in final form 14 December 1992)

Abstract
Some critical properties for static and dynamic equilibrium superradiant models are discussed, within a Gaussian fluctuation theory. The temperature critical region and the $\lambda$ -critical region are calculated and the phase diagram of the superradiant phase transition is obtained.