Perturbative analysis of non-singular cosmological model

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

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General Relativity and Quantum Cosmology

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http://salesiana.dossiersoluciones.com/handle/123456789/36419

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/gr-qc/9901065
 http://arxiv.org/abs/gr-qc/9901065
 Proceedings of the Seventh Workshop on General Relativity and Gravitation (Y. Eriguchi et.al., ed.) pp.249

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arXiv