Gravitational waves in non-singular string cosmologies

Details Gravitational waves in non-singular string cosmologies Gravitational waves in non-singular string cosmologies

2001-01-05

arxiv.org/abs/gr-qc/0101019v1

Nucl.Phys. B607 (2001) 406-428

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

24 pages, 7 figures

Scientific paper

10.1016/S0550-3213(01)00182-1

We study the evolution of tensor metric fluctuations in a class of non-singular models based on the string effective action, by including in the perturbation equation the higher-derivative and loop corrections needed to regularise the background solutions. We discuss the effects of such higher-order corrections on the final graviton spectrum, and we compare the results of analytical and numerical computations.

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