Cosmological Solutions of Type II Superstrings

Details Cosmological Solutions of Type II Superstrings Cosmological Solutions of Type II Superstrings

1999-01-19

arxiv.org/abs/gr-qc/9901052v1

Phys.Lett. B452 (1999) 240-243

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, Latex, no figures

Scientific paper

10.1016/S0370-2693(99)00319-6

We study maximally symmetric cosmological solutions of type II supersymmetric strings in the presence of the exact quartic curvature corrections to the lowest order effective action, including loop and D-instanton effects. We find that, unlike the case of type IIA theories, de Sitter solutions exist for type IIB superstrings, a conclusion that remains valid when higher-curvature corrections are included on the basis of SL(2,Z) invariance.

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