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APS » Journals » Phys. Rev. D » Volume 75 » Issue 12
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Phys. Rev. D 75, 123521 (2007) [11 pages]

Radiation equation of state and loop quantum gravity corrections

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Martin Bojowald
Institute for Gravitational Physics and Geometry, The Pennsylvania State University, 104 Davey Lab, University Park, Pennsylvania 16802, USA

Rupam Das
Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA
Institute for Gravitational Physics and Geometry, The Pennsylvania State University, 104 Davey Lab, University Park, Pennsylvania 16802, USA

Received 16 January 2007; published 28 June 2007

The equation of state for radiation is derived in a canonical formulation of the electromagnetic field. This allows one to include correction terms expected from canonical quantum gravity and to infer implications to the universe evolution in radiation dominated epochs. Corrections implied by quantum geometry can be interpreted in physically appealing ways, relating to the conformal invariance of the classical equations.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.75.123521
DOI:
10.1103/PhysRevD.75.123521
PACS:
98.80.Jk, 04.60.Pp
 
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