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Two-sided estimates for the internal energy of thermal photons. (English) Zbl 1178.82046

Theor. Math. Phys. 136, No. 1, 1031-1036 (2003); translation from Teor. Mat. Fiz. 136, No. 1, 158-163 (2003).
Summary: The upper- and lower-bound estimates for the thermodynamic averages of the occupation number operators are obtained for the case of a nonlinear photon system in thermal equilibrium with the thermostat. Two-sided inequalities for the internal energy of such a system are constructed from the obtained estimates.

MSC:

82C10 Quantum dynamics and nonequilibrium statistical mechanics (general)
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