Vacuum fluctuations in a supersymmetric model in FRW spacetime
High Energy Physics - Theory
2011-05-13 v1 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We study a noninteracting supersymmetric model in an expanding FRW spacetime. A soft supersymmetry breaking induces a nonzero contribution to the vacuum energy density. A short distance cutoff of the order of Planck length provides a scale for the vacuum energy density comparable with the observed cosmological constant. Assuming the presence of a dark energy substance in addition to the vacuum fluctuations of the field an effective equation of state is derived in a selfconsistent approach. The effective equation of state is sensitive to the choice of the cut-off but no fine tuning is needed.
Keywords
Cite
@article{arxiv.1104.1349,
title = {Vacuum fluctuations in a supersymmetric model in FRW spacetime},
author = {Neven Bilic},
journal= {arXiv preprint arXiv:1104.1349},
year = {2011}
}
Comments
19 pages, accepted for publication in Phys. Rev. D