String inspired braneworld cosmology
摘要
We consider braneworld scenarios including the leading correction to the Einstein-Hilbert action suggested by superstring theory, the Gauss-Bonnet term. We obtain and study the complete set of equations governing the cosmological dynamics. We find they have the same form as those in Randall-Sundrum scenarios but with time-varying four-dimensional gravitational and cosmological constants. Studying the bulk geometry we show that this variation is produced by bulk curvature terms parameterized by the mass of a black hole. Finally, we show there is a coupling between these curvature terms and matter that can be relevant for early universe cosmology.
引用
@article{arxiv.hep-th/0202060,
title = {String inspired braneworld cosmology},
author = {Cristiano Germani and Carlos F. Sopuerta},
journal= {arXiv preprint arXiv:hep-th/0202060},
year = {2009}
}
备注
5 pages, 1 figure, Revtex; two references added, corrected version to appear in Phys. Rev. Lett. (2002)