2003/07/31 by Shin'ichi Nojiri, Sergei D. Odintsov · 1 citation
Physics and Astronomy · #hep-th #astro-ph #hep-ph
paper · pdf · doi:10.1016/j.physletb.2003.09.091
published as Phys.Lett.B576:5-11,2003 · LaTeX file, 14 pages, minor changes, version to appear in PLB
arxiv created 2003/10/01 · arxiv updated 2009/12/01
It is suggested \citeCDTT 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.