Perturbative analysis of non-singular cosmological model

Details Perturbative analysis of non-singular cosmological model Perturbative analysis of non-singular cosmological model

1999-01-23

arxiv.org/abs/gr-qc/9901065v1

Proceedings of the Seventh Workshop on General Relativity and Gravitation (Y. Eriguchi et.al., ed.) pp.249

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Talk at YITP, Kyoto, in the Seventh Workshop on General Relativity and Gravitation (Oct., 1997)

Scientific paper

A stability analysis is made for a non-singular pre-big-bang like cosmological model based on 1-loop corrected string effective action. Its homogeneous and isotropic solution realizes non-singular transition from de Sitter universe to Friedmann-like universe, via super inflation phase. We are interested in whether the non-singular nature of the solution would be stable or not in more general inhomogeneous case. Perturbative analysis is made for scalar, vector, and tensor linear perturbations, and instability is found for tensor-type perturbation.

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