Chaplygin-Kalb-Ramond Quartessence
High Energy Physics - Theory
2007-05-23 v2 Astrophysics
General Relativity and Quantum Cosmology
Abstract
Unified dark matter/energy models (quartessence) based upon the Chaplygin gas D-brane fail owing to the suppression of structure formation by the adiabatic speed of sound. Including string theory effects, in particular the Kalb-Ramond field which becomes massive via the brane, we show how nonadiabatic perturbations allow successful structure formation.
Cite
@article{arxiv.hep-th/0504082,
title = {Chaplygin-Kalb-Ramond Quartessence},
author = {Neven Bilic and Gary B. Tupper and Raoul D. Viollier},
journal= {arXiv preprint arXiv:hep-th/0504082},
year = {2007}
}
Comments
9 pages, substantially expanded, arguments clarified, added references, results unchanged