2015/07/31 by Eduardo Guendelman, Ramon Herrera, Pedro Labrana +2
Physics and Astronomy · #hep-th #gr-qc
published as Astronomische Nachrichten 336 (2015) 810-814 · 5 pages, based on talk at STARS-2015 (Havana, Cuba), partial overlap with arXiv:1408.5344v4, arXiv:1505.07680
arxiv created 2015/07/31 · arxiv updated 2016/11/29
Based on an earlier introduced new class of generalized gravity-matter models defined in terms of two independent non-Riemannian volume forms (alternative generally covariant integration measure densities) on the space-time manifold, we derive an effective "Einstein-frame" theory featuring the following remarkable properties: (i) We obtain effective potential for the cosmological scalar field possessing two infinitely large flat regions which allows for a unified description of both early universe inflation as well as of present dark energy epoch; (ii) For a specific parameter range the model possesses a non-singular stable "emergent universe" solution which describes an initial phase of evolution that precedes the inflationary phase.