✦ LIBER ✦

Generalisations of the pitzer—gwinn and feynman—hibbs approximations for quantum partition functions

✍ Scribed by Antoine Royer

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 280 KB
Volume: 119
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(85)80419-x

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✦ Synopsis

By using an exprwmn of Feynman and Hibbs for Ihe panirion funchon Z = Tr(exp[ -fl( p'/2n1+ I')]) in lerrns of imegnls over paths wilh tixed means, and substituting for the potenlial Y a local harmonic approxl-L (following Mdler). ~c obtain nn improved Pluer-Gwinn approximation_ as simple to use as the original one bul applicable to a much broader class of potentrals Systematic corrections. in rhe form of cumulan~ and Wigner-Kirkw& enpanslons are then obtained.