A statistical mechanical approach to restricted integer partition functions. (17th May 2018)

• Record Type: Journal Article
• Authors: Zhou, Chi-Chun; Dai, Wu-Sheng
• Is Part Of: Journal of statistical mechanics. (2018:May)
• Publication Date: 2018-05-17
• Subjects: 2 -- 1; Statistical mechanics -- Periodicals; Mechanics -- Statistical methods -- Periodicals; 530.1305
• DOI: 10.1088/1742-5468/aabfc9
• Languages: English
• ISSNs: 1742-5468

Abstract

Abstract: The main aim of this paper is twofold: (1) suggesting a statistical mechanical approach to the calculation of the generating function of restricted integer partition functions which count the number of partitions—a way of writing an integer as a sum of other integers under certain restrictions. In this approach, the generating function of restricted integer partition functions is constructed from the canonical partition functions of various quantum gases. (2) Introducing a new type of restricted integer partition functions corresponding to general statistics which is a generalization of Gentile statistics in statistical mechanics; many kinds of restricted integer partition functions are special cases of this restricted integer partition function. Moreover, with statistical mechanics as a bridge, we reveal a mathematical fact: the generating function of restricted integer partition function is just the symmetric function which is a class of functions being invariant under the action of permutation groups. Using this approach, we provide some expressions of restricted integer partition functions as examples.