Stochastic approach of gravitational waves in presence of a decaying cosmological parameter from a 5D vacuum theory of gravity

Details Stochastic approach of gravitational waves in presence of a decaying cosmological parameter from a 5D vacuum theory of gravity Stochastic approach of gravitational waves in presence of a decaying cosmological parameter from a 5D vacuum theory of gravity

2007-05-14

arxiv.org/abs/0705.2034v6

Nuovo Cim.B122:897-907,2007; Nuovo Cim.122B:897-907,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

version to be published in Il Nuovo Cimento B

Scientific paper

10.1393/ncb/i2007-10414-7

We develop an stochastic approach to study gravitational waves produced during the inflationary epoch under the presence of a decaying cosmological parameter, on a 5D geometrical background which is Riemann flat. We obtain that the squared tensor metric fluctuations depend strongly on the cosmological parameter $\Lambda (t)$ and we finally illustrate the formalism with an example of a decaying $\Lambda(t)$.

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