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Shear and bulk viscosities of a photon gas at low temperature

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Llanes Estrada, Felipe José and Dobado González, Antonio and Torres Rincón, Juan M. (2013) Shear and bulk viscosities of a photon gas at low temperature. Physical Review D, 88 (5). ISSN 1550-7998

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Official URL: http://dx.doi.org/10.1103/PhysRevD.88.053006


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Abstract

We explore the viscosities of a photon gas by means of the Euler-Heisenberg effective theory and quantum electrodynamics at zero electron chemical potential. We find parametric estimates that show a very large shear viscosity and an extremely small bulk viscosity (reflecting the very weak coupling simultaneously with a very approximate dilatation invariance). The system is of some interest because it exemplifies very neatly the influence of the breaking of scale invariance on the bulk viscosity.


Item Type:Article
Additional Information:

© 2013 American Physical Society.
We thank useful conversations with T. Schaefer. This work was supported by Spanish Grants No. FPA2010-16963 and No. FPA2011-27853-C02-01. J.M.T.-R. is funded by Grant No. FP7 PEOPLE-2011-CIG under Contract No. PCIG09-GA-2011-291679.

Uncontrolled Keywords:Astronomy, Astrophysics, Physics, Particles, Fields
Subjects:Sciences > Physics
ID Code:23583
Deposited On:21 Nov 2013 13:10
Last Modified:20 Apr 2018 18:20

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