Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2007-03-07
JCAP 0705:010,2007
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
32 pages, 2 eps figures
Scientific paper
10.1088/1475-7516/2007/05/010
We consider quantum effects of a massive antisymmetric tensor field on the dynamics of de Sitter space-time. Our starting point is the most general, stable, linearized Lagrangian arising in nonsymmetric gravitational theories (NGTs), where part of the antisymmetric field mass is generated by the cosmological term. We construct a renormalization group (RG) improved effective action by integrating out one loop vacuum fluctuations of the antisymmetric tensor field and show that, in the limit when the RG scale goes to zero, the Hubble parameter -- and thus the effective cosmological constant -- relaxes rapidly to zero. We thus conclude that quantum loop effects in de Sitter space can dramatically change the infrared sector of the on-shell gravity, making the expansion rate insensitive to the original (bare) cosmological constant.
Janssen Tomas
Prokopec Tomislav
No associations
LandOfFree
Vacuum properties of nonsymmetric gravity in de Sitter space does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Vacuum properties of nonsymmetric gravity in de Sitter space, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum properties of nonsymmetric gravity in de Sitter space will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-254638