QUANTUM CORRECTIONS FOR GENERAL PARTITION-FUNCTIONS

The classical limit for quite general partition functions is obtained using coherent states. In this framework a general procedure is presen ted to obtain all the quantum corrections to the classical limit. In p articular, the first- and second-order corrections are worked out expl icitly, and the classical limit for the Tsallis thermostatistics is de termined. The results of this work generalize the ones obtained by Wig ner (Phys. Rev. 40 (1932) 749) for usual statistical mechanics. (C) 19 98 Elsevier Science B.V. All rights reserved.