Published October 15, 2008 | Version v1
Journal article Metadata-only

Functional Integrals and Variational-Cumulant Expansion in sine-Gordon-Thirring Model

Creators

  • 1. Department of Physics, Sichuan Normal University, Chengdu 610066 (China)

Description

The free energy in 1D sine-Gordon-Thirring model with impurity coupling is studied by means of functional integrals and variational-cumulant expansion methods. Two variational parameters are introduced to evaluate free energy and statistical averages. It is shown that the non-perturbation method of functional integrals can be applied to strong-coupling range of fermion systems

Availability note (English)

Available from http://dx.doi.org/10.1088/0253-6102/50/4/20

Additional details

Identifiers

DOI
10.1088/0253-6102/50/4/20;

Publishing Information

Journal Title
Communications in Theoretical Physics
Journal Volume
50
Journal Issue
4
Journal Page Range
p. 893-896
ISSN
0253-6102

INIS

Country of Publication
China
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40077035
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
FERMIONS; FREE ENERGY; INTEGRALS; PERTURBATION THEORY; SINE-GORDON EQUATION; STRONG-COUPLING MODEL; THIRRING MODEL; VARIATIONAL METHODS
Descriptors DEC
CALCULATION METHODS; ENERGY; EQUATIONS; FIELD EQUATIONS; MATHEMATICAL MODELS; PARTICLE MODELS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES