Auteur(s): Pinto Marcus Benghi, Ferrari Gabriel N., Kneur J.-L., Ramos Rudnei O.
Conference: 8TH INTERNATIONAL WORKSHOP DICE2016: SPACETIME - MATTER - QUANTUM MECHANICS (Castiglioncello, IT, 2016-09-12)
Actes de conférence: Journal of Physics Conference Series, vol. 880 p.012049 (2017)
Texte intégral en Openaccess : 
Ref HAL: hal-01624698_v1
DOI: 10.1088/1742-6596/880/1/012049
WoS: WOS:000412424700049
Exporter : BibTex | endNote
Résumé:
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.