Reliability of the Optimized Perturbation Theory for scalar fields at finite temperature
Abstract
The thermodynamics of a massless scalar field with a quartic interaction is studied up to third order in the Optimized Perturbation Theory (OPT) method. A comparison with other nonperturbative approaches is performed such that the reliability of OPT is accessed.
 Publication:

XII Hadron Physics
 Pub Date:
 March 2013
 DOI:
 10.1063/1.4795989
 arXiv:
 arXiv:1211.7079
 Bibcode:
 2013AIPC.1520..330F
 Keywords:

 finite temperature field theory;
 perturbation theory;
 reliability;
 11.10.Wx;
 Finitetemperature field theory;
 High Energy Physics  Phenomenology;
 Condensed Matter  Statistical Mechanics;
 High Energy Physics  Theory;
 Nuclear Theory
 EPrint:
 3 pages, 5 figures, Proceedings contribution for Hadrons XII