Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
By making use of the double-time Green function technique, we study the thermodynamics of a deformed Bose gas, which describes well the properties of density intensive photonic gas and radiation fields of the early universe. A general form of statistical distribution function is obtained. We show explicitly the expression of the distribution function in some limitation cases. The free energy, equation of state, specific heat and other thermodynamic properties of the deformed Bose gas are presented.