Gravitational waves during inflation in presence of a decaying cosmological parameter from a 5D vacuum theory of gravity
arXiv:gr-qc/0703156 · doi:10.1016/j.physletb.2007.04.043
Abstract
We study gravitational waves generated during the inflationary epoch in presence of a decaying cosmological parameter on a 5D geometrical background which is Riemann flat. Two examples are considered, one with a constant cosmological parameter and the second with a decreasing one.
accepted in Phys. Lett. B