Back to Search Start Over

Stable Emergent Universe -- A Creation without Big-Bang

Authors :
Guendelman, Eduardo
Herrera, Ramon
Labrana, Pedro
Nissimov, Emil
Pacheva, Svetlana
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

Details

Database :
arXiv
Journal :
Astronomische Nachrichten 336 (2015) 810-814
Publication Type :
Report
Accession number :
edsarx.1507.08878
Document Type :
Working Paper