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Variational method for the quantum statistics of interacting particles.

Author: M GIRARDEAU; BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH.
Publisher: Ft. Belvoir Defense Technical Information Center JUN 1961.
Edition/Format:   Print book : English
Database:WorldCat
Summary:
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  Read more...
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Document Type: Book
All Authors / Contributors: M GIRARDEAU; BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH.
OCLC Number: 227266982
Description: 1 page

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).

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