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Stable Emergent Universe -- A Creation without Big-Bang
- Source :
- Astronomische Nachrichten 336 (2015) 810-814
- Publication Year :
- 2015
-
Abstract
- 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.<br />Comment: 5 pages, based on talk at STARS-2015 (Havana, Cuba), partial overlap with arXiv:1408.5344v4, arXiv:1505.07680
- Subjects :
- High Energy Physics - Theory
General Relativity and Quantum Cosmology
Subjects
Details
- Database :
- arXiv
- Journal :
- Astronomische Nachrichten 336 (2015) 810-814
- Publication Type :
- Report
- Accession number :
- edsarx.1507.08878
- Document Type :
- Working Paper