Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2012-02-24
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
5 pages, no figures
Scientific paper
We study cosmological gravitational waves generated during inflation under the influence of a decaying cosmological "constant", in the Transverse-Traceless (TT) gauge. In our approach we consider a non-perturbative contribution of the dynamical cosmological "constant" to the tensor modes. As an application of the model we study the well-known cases $\Lambda(t)=\sigma H^2$ and $\Lambda(t) =\vartheta H$. The spectrum of gravitational waves for the first case results scale invariant at the end of inflation, whereas for the second case scale invariance is not achieved, leaving this to new proposals of the form: $\Lambda(t)=f(H,H^2)$, in order to include inflation in some $\Lambda(t)$CDM models. We also found that the non-perturbative contributions of $\Lambda(t)$, accelerate the decreasing of the amplitude of gravitational waves during a power-law inflationary stage, by an exponential factor.
Claudia Moreno
Jose Edgar Madriz Aguilar
Marina Reyes Luz
No associations
LandOfFree
On gravitational waves generated during inflation under the influence of a dynamical cosmological "constant" does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On gravitational waves generated during inflation under the influence of a dynamical cosmological "constant", we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On gravitational waves generated during inflation under the influence of a dynamical cosmological "constant" will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-78190