The Composite Operator (CJT) Formalism in the <math>(λϕ4+ηϕ6)D=3</math> Model at Finite Temperature

Physics NotePublished

The Composite Operator (CJT) Formalism in the $<math>(\lambda\varphi^4+\eta\varphi^{6})_{D=3}</math>$ Model at Finite Temperature

G. F. J. Ananos; N.F. Svaiter

1999

Authors: G. F. J. Ananos; N.F. Svaiter
Type: Physics Note
Status: Published
Publication date: 1999
Description: We discuss three-dimensional <math>\lambda\varphi^4+\eta\varphi^6\,\!</math> theory in the context of the 1/N expansion at finite temperature. We use the method of the composite operator (CJT) for summing a large sets of Feynman graphs. We analyse the behavior of the thermal square mass and the thermal coupling constant in the low and high temperature limit. The existent of the tricritical point at some temperature is found using this non-pertubative method.
Year: 1999
Number: CBPF-NF-054/99
Linked to a thesis: No
Linked to a grant: No