1995/06/30 by S. Kalyana Rama
Physics and Astronomy · #Advanced Mathematical Theories and Applications #Big Bang (financial markets) #Black Holes and Theoretical Physics #Cosmology #Cosmology and Gravitation Theories #Curvature #Dilaton #Homogeneous #Isotropy #Simple (philosophy) #Universe #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.1016/0370-2693(96)00146-3
published as Phys.Lett. B373 (1996) 282-288 · 14 pages. Latex file. Results unchanged, more detailed discussion provided
openalex publication_date 1996/04/01 · arxiv created 1996/07/05 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study homogeneous isotropic universe in a graviton-dilaton theory obtained, in a previous paper, by a simple requirement that the theory be able to predict non trivial values for β and/or γ for a charge neutral point star, without any naked singularities. We find that in this universe the physical time can be continued indefinitely into the past or future, and that all the physical curvature invariants are always finite, showing the absence of big bang singularity. Adding a dilaton potential, we find again the same features. As a surprising bonus, there emerges naturally a Brans-Dicke function, which has precisely the kind of behaviour needed to make ωbd (\rm today) > 500 in hyperextended inflation.