The pressure of QED from the two-loop 2PI effective action
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
We compute the pressure of hot quantum electrodynamics from the two-loop truncation of the 2PI effective action. Since the 2PI resummation guarantees gauge-fixing independence only up to the order of the truncation, our result for the pressure presents a gauge dependent contribution of O(e^4). We numerically characterize the credibility of this gauge-dependent calculation and find that the uncertainty due to gauge parameter dependence is under control for xi<1. Our calculation also suggests that the choice of Landau gauge may minimize gauge-dependent effects.
Cite
@article{arxiv.0709.2316,
title = {The pressure of QED from the two-loop 2PI effective action},
author = {Szabolcs Borsanyi and Urko Reinosa},
journal= {arXiv preprint arXiv:0709.2316},
year = {2008}
}
Comments
15 latex pages with 3 figures