Nonperturbative calculation of symmetry breaking in quantum field theory
Abstract
A new version of the δ expansion is presented, which, unlike the conventional δ expansion, can be used to do nonperturbative calculations in a self-interacting scalar quantum field theory having broken symmetry. We calculate the expectation value of the scalar field to first order in δ, where δ is a measure of the degree of nonlinearity in the interaction term.
- Publication:
-
Physical Review D
- Pub Date:
- March 1997
- DOI:
- 10.1103/PhysRevD.55.R3255
- arXiv:
- arXiv:hep-th/9608048
- Bibcode:
- 1997PhRvD..55.3255B
- Keywords:
-
- 11.10.Lm;
- 02.30.Mv;
- 11.10.Kk;
- 11.30.Er;
- Nonlinear or nonlocal theories and models;
- Approximations and expansions;
- Field theories in dimensions other than four;
- Charge conjugation parity time reversal and other discrete symmetries;
- High Energy Physics - Theory
- E-Print:
- 12 pages, no figures, REVTeX