Spontaneous Decay of the Effective Cosmological Constant

Abstract

We discuss the notion that quantum fields may induce an effective time-dependent cosmological constant which decays from a large initial value. It is shown that such cosmological models are viable in a non-de Sitter spacetime.

Comments: LaTex, 10 pages, 1 figure (not included).A minor correction in the text and the last referance.To be published in Mod. Phys. Lett. A