The pressure of QED from the two-loop 2PI effective action

Sz Borsányi; U. Reinosa

doi:10.1016/j.physletb.2008.02.011

The pressure of QED from the two-loop 2PI effective action

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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 (e⁴). We numerically characterize the credibility of this gauge-dependent calculation and find that the uncertainty due to gauge parameter dependence is under control for ξ ≲ 1. Our calculation also suggests that the choice of Landau gauge may minimize gauge-dependent effects.

Original language	English
Pages (from-to)	88-94
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	661
Issue number	2-3
DOIs	https://doi.org/10.1016/j.physletb.2008.02.011
Publication status	Published - 20 Mar 2008
Externally published	Yes

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10.1016/j.physletb.2008.02.011

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title = "The pressure of QED from the two-loop 2PI effective action",

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 (e4). We numerically characterize the credibility of this gauge-dependent calculation and find that the uncertainty due to gauge parameter dependence is under control for ξ ≲ 1. Our calculation also suggests that the choice of Landau gauge may minimize gauge-dependent effects.",

author = "Sz Bors{\'a}nyi and U. Reinosa",

year = "2008",

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doi = "10.1016/j.physletb.2008.02.011",

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T1 - The pressure of QED from the two-loop 2PI effective action

AU - Borsányi, Sz

AU - Reinosa, U.

PY - 2008/3/20

Y1 - 2008/3/20

N2 - 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 (e4). We numerically characterize the credibility of this gauge-dependent calculation and find that the uncertainty due to gauge parameter dependence is under control for ξ ≲ 1. Our calculation also suggests that the choice of Landau gauge may minimize gauge-dependent effects.

AB - 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 (e4). We numerically characterize the credibility of this gauge-dependent calculation and find that the uncertainty due to gauge parameter dependence is under control for ξ ≲ 1. Our calculation also suggests that the choice of Landau gauge may minimize gauge-dependent effects.

U2 - 10.1016/j.physletb.2008.02.011

DO - 10.1016/j.physletb.2008.02.011

M3 - Article

AN - SCOPUS:39949085754

SN - 0370-2693

VL - 661

SP - 88

EP - 94

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 2-3

ER -

The pressure of QED from the two-loop 2PI effective action

Abstract

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