On the stability of cosmological metrics in Einstein-Cartan cosmologies

Details On the stability of cosmological metrics in Einstein-Cartan cosmologies On the stability of cosmological metrics in Einstein-Cartan cosmologies

2000-08-27

arxiv.org/abs/gr-qc/0008064v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Revised version accepted in Physics Letters B

Scientific paper

Two metric perturbations in Einstein-Cartan cosmology are examined.The first case is the scalar mode perturbation of de Sitter metric in Einstein-Cartan cosmology.In this case small perturbations of de Sitter metric shows that this metric is unstable for a universe with spin-torsion density and dilaton fields.In the second case we show that the Friedmann metric in the same space is also unstable under the small perturbations.

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