Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-11-09
Phys.Rev. D71 (2005) 063520
Physics
High Energy Physics
High Energy Physics - Theory
54 pages, v2: minor corrections, refs. added, v3: some numerical results corrected, v4: minor corrections, a ref. added, to ap
Scientific paper
10.1103/PhysRevD.71.063520
We study time-dependent solutions in M and superstring theories with higher order corrections. We first present general field equations for theories of Lovelock type with stringy corrections in arbitrary dimensions. We then exhaust all exact and asymptotic solutions of exponential and power-law expansions in the theory with Gauss-Bonnet terms relevant to heterotic strings and in the theories with quartic corrections corresponding to the M-theory and type II superstrings. We discuss interesting inflationary solutions that can generate enough e-foldings in the early universe.
Maeda Kei--ichi
Ohta Nobuyoshi
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