Scale invariant non linear sigma model at finite temperatures

8th International Workshop DICE2016: Spacetime - Matter - Quantum Mechanics

物理学;力学

Pinto, Marcus Benghi^1 ; Ferrari, Gabriel N.^1 ; Kneur, Jean-Loïc^2 ; Ramos, Rudnei O.^3

Departamento de Física, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina

88040-900, Brazil^1

Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS, Université de Montpellier 2, Montpellier

34095, France^2

Departamento de Física Teórica, Universidade Do Estado Do Rio de Janeiro, Rio de Janeiro, RJ

20550-013, Brazil^3

关键词: Finite temperatures;    Nonlinear sigma model;    Perturbation theory;    Renormalization group;    Resummation;    Scale invariance;    Scale invariant;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/880/1/012049/pdf
DOI  :  10.1088/1742-6596/880/1/012049

学科分类：力学，机械学

来源: IOP

【 摘 要 】

The recently proposed renormalization group improved optimized perturbation theory is employed to evaluate the pressure of the two dimensional non linear sigma model at finite temperatures. We explicitly show how this powerful resummation method can turn the lowest (one loop) perturbative contribution to the pressure, which is not RG invariant, into a non perturbative quantity exhibiting scale invariance.