NONPERTURBATIVE CALCULATION OF SYMMETRY-BREAKING IN QUANTUM-FIELD THEORY

Authors
BENDER CM MILTON KA
Citation
Cm. Bender et Ka. Milton, NONPERTURBATIVE CALCULATION OF SYMMETRY-BREAKING IN QUANTUM-FIELD THEORY, Physical review. D. Particles and fields, 55(6), 1997, pp. 3255-3259
Citations number
27
Categorie Soggetti
Physics, Particles & Fields
Journal title
Physical review. D. Particles and fields → ACNP
ISSN journal
05562821
Volume
55
Issue
6
Year of publication
1997
Pages
3255 - 3259
Database
ISI
SICI code
0556-2821(1997)55:6<3255:NCOSIQ>2.0.ZU;2-Z
Abstract
A new version of the delta expansion is presented, which, unlike the c onventional delta expansion, can be used to do nonperturbative calcula tions in a self-interacting scalar quantum field theory having broken symmetry. We calculate the expectation value of the scalar field to fi rst order in delta, where delta is a measure of the degree of nonlinea rity in the interaction term.