Accession Number:

AD0262993

Title:

VARIATIONAL METHOD FOR THE QUANTUM STATISTICS OF INTERACTING PARTICLES

Descriptive Note:

Corporate Author:

BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s):

Report Date:

1961-06-01

Pagination or Media Count:

1.0

Abstract:

A variational method is developed for calculating the thermodynamic potential of quantummechanical many-body systems with pair-wise interactions. The method is based on Peierls theorem and yields an upper bound to the thermodynamic potential density in the limit of an infinite system. Evaluation and minimization of the bound involves solution of a set of coupled nonlinear integral equations for the distribution function of elementary excitations and for functions defining a unitary transformation from bare particles to elementary excitations. Application of the theory to the BCS model of superconductivity reproduces the BCS results, and application to a degenerate imperfect Bose gas gives equations which are shown to be equivalent to those of Tolmachev and Wentzel. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE