On the Finite Temperature <math>λϕ4</math> Model. Is There a First Order Phase Transition in <math>(λϕ4)3?</math>

Nota de FísicaPublicado

On the Finite Temperature $<math>\lambda\varphi^4</math>$ Model. Is There a First Order Phase Transition in $<math>(\lambda\varphi^4)_3?</math>$

A.P.C. Malbouisson; N.F. Svaiter

1995

Autores: A.P.C. Malbouisson; N.F. Svaiter
Tipo: Nota de Física
Status: Publicado
Data de publicação: 1995
Descrição: We investigate the behavior at finite temperature of the massive <math>\lambda\varphi^4</math> model in a D-dimensional spacetime, performing a renormalization up to the order of one loop. In this approximation we show that the thermal mass increase with the temperature, while the thermal coupling constant decrese with the temperature. We establish that in the <math>(\lambda\varphi^4)_3</math> model there is a temperature <math>\beta_{\ast}-1</math> above which the coupling constant becomes negative. We argue that the system could develop a first order phase transition, where the origin corresponds to a metastable vacuum.
Ano: 1995
Número: CBPF-NF-070/95
Vínculo com tese: Não
Vínculo com bolsa: Não