Asymptotic lower bound for the relative disparities of truncated-path-integral partition functions

Authors
Citation
S. Golden, Asymptotic lower bound for the relative disparities of truncated-path-integral partition functions, J STAT PHYS, 95(1-2), 1999, pp. 495-502
Citations number
9
Categorie Soggetti
Physics
Journal title
JOURNAL OF STATISTICAL PHYSICS
ISSN journal
00224715 → ACNP
Volume
95
Issue
1-2
Year of publication
1999
Pages
495 - 502
Database
ISI
SICI code
0022-4715(199904)95:1-2<495:ALBFTR>2.0.ZU;2-H
Abstract
Any truncated-path-integral partition function of a nonrelativistic quantum system in thermodynamic equilibrium one obtained by means of the Feynman p ath-interval-procedure using a finite number of such integrals - is known t o have a value not less than that of the exact one corresponding to it. A r igorous asymptotic lower bound obtained for the relative disparity in their values - the difference in their values divided by that of the exact parti tion function confirms asymptotic positive-definiteness of the original upp er bound. Values determined directly for a linear harmonic oscillator agree asymptotically with values of they bound.