$\Lambda$-Inflation and CMBR Anisotropy

Abstract

We argue that a $\Lambda$-inflation model can ensure large relative contribution of cosmic gravity waves into the $\Delta T/T$ at COBE scale preserving at the same time a near scale-invariant spectrum of cosmological density perturbations favored by observational data ($n_S\simeq 1$). High efficiency of these models to meet observational tests is discussed.

5pages, to appear in "Cosmology and Particle Physics", eds J.Garcia-Bellido, R.Durrer, and M.Shaposhnikov