ON THE FEATURES OF IDEAL BOSE-GAS THERMODYNAMIC PROPERTIES AT A FINITE PARTICLE NUMBER

The paper is devoted to the theory of an ideal Bose-gas with a finite number N of particles. The exact expressions for the partition functions and occupation numbers of the model in the grand canonical, canonical, and microcanonical ensembles are found. From the calculations, it is followed that, oppositely to the accepted opinion that the chemical potential it of an ideal Bose-gas is only negative, it can take values in the range -infinity < mu < infinity. The asymptotic expressions (in the case N >> 1) for the partition functions and occupation numbers for all above-mentioned thermodynamic ensembles are also evaluated.