Strong-field Stark effect: perturbation theory and 1/n expansion
β Scribed by V.S. Popov; V.D. Mur; A.V. Sergeev; V.M. Weinberg
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 360 KB
- Volume
- 149
- Category
- Article
- ISSN
- 0375-9601
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
An apparent difference between formulating mean field perturbation theory for @\* field theory via path integrals or via functional differential equations when there are external sources present is shown not to exist when mean lield theory is considered as the N= 1 limit of the O(N) @" field theory.
U(N) symmetric three-dimensional (I$')~ theory is studied in the l/N expansion, using quantum field theory techniques. An effective action containing the composite operator +2 is used. It is shown to be renormalizable in each order of the l/N expansion. The lirst two orders are considered. A vacuum