From inflation to dark energy through a dynamical Lambda: an attempt at alleviating fundamental cosmic puzzles
arXiv:1307.6251 · doi:10.1142/S021827181342008X
Abstract
After decades of successful hot big-bang paradigm, Cosmology still lacks a framework in which the early inflationary phase of the universe smoothly matches the radiation epoch and evolves to the present `quasi' de Sitter spacetime. No less intriguing is that the current value of the effective vacuum energy density is vastly smaller than the value that triggered inflation. In this Essay we propose a new class of cosmologies capable of overcoming, or highly alleviating, some of these acute cosmic puzzles. Powered by a decaying vacuum energy density, the spacetime emerges from a pure nonsingular de Sitter vacuum stage, "gracefully" exits from inflation to a radiation phase followed by dark matter and vacuum regimes, and, finally, evolves to a late time de Sitter phase.
8 pages, 1 figure. To appear in IJMPD. This essay received an honorable mention in the 2013 Essay Competition of the Gravity Research Foundation
References in corpus (4)
Cited by in corpus (36)
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