Where new gravitational physics comes from: M-theory?
High Energy Physics - Theory
2009-09-17 v3 Astrophysics
High Energy Physics - Phenomenology
Abstract
It is suggested \cite{CDTT} that current cosmic acceleration arises due to modification of General Relativity by the terms with negative powers of curvature. We show that time-dependent (hyperbolic) compactifications of string/M-theory lead to the effective 4d gravity which naturally contains such terms. The same may be achieved in braneworld by the proper choice of the boundary action. Hence, such a model which seems to eliminate the need for dark energy may have the origin in M-theory.
Cite
@article{arxiv.hep-th/0307071,
title = {Where new gravitational physics comes from: M-theory?},
author = {Shin'ichi Nojiri and Sergei D. Odintsov},
journal= {arXiv preprint arXiv:hep-th/0307071},
year = {2009}
}
Comments
LaTeX file, 14 pages, minor changes, version to appear in PLB