Cosmic magnetic fields and dark energy in extended electromagnetism



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López Maroto, Antonio and Beltrán Jiménez, José (2011) Cosmic magnetic fields and dark energy in extended electromagnetism. Journal of physics: Conference Series, 314 . ISSN 1742-6588

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We discuss an extended version of electromagnetism in which the usual gauge fixing term is promoted into a physical contribution that introduces a new scalar state in the theory. This new state can be generated from vacuum quantum fluctuations during an inflationary era and, on super-Hubble scales, gives rise to an effective cosmological constant. The value of such a cosmological constant coincides with the one inferred from observations as long as inflation took place at the electroweak scale. On the other hand, the new state also generates an effective electric charge density on sub-Hubble scales that produces both vorticity and magnetic fields with coherent lengths as large as the present Hubble horizon.

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This work has been supported by MICINN (Spain) project numbers FIS 2008- 01323 and FPA 2008-00592, CAM/UCM 910309, MEC grant BES-2006-12059 and MICINN Consolider-Ingenio MULTIDARK CSD2009-00064. J.B. also wishes to thank support from the Norwegian Council under the YGGDRASIL project no 195761/V11.
Spanish Relativity Meeting (ERE 2010) on Gravity as a Crossroad in Physics (2010. Granada,España)

Uncontrolled Keywords:Astronomy & Astrophysics, Physics, Multidisciplinary, Physics, Particles & Fields
Subjects:Sciences > Physics
ID Code:26501
Deposited On:07 Aug 2014 10:30
Last Modified:07 Aug 2014 10:30

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