2005/04/30 by M. Sami, A. V. Toporensky, Alexey Toporensky +2 · 3 citations
Mathematics · Physics and Astronomy · #Big Bounce #Big Crunch #Big Rip #Black Holes and Theoretical Physics #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #De Sitter universe #Dilaton #Galaxies: Formation, Evolution, Phenomena #Geometry #Heterotic string theory #Hubble's law #Mathematical physics #Mathematics #Metric expansion of space #Phantom energy #Physical cosmology #Physics #Quantum gravity #Quantum mechanics #Relationship between string theory and quantum field theory #Singularity #Steady State theory #String (physics) #String cosmology #Theoretical physics #Ultimate fate of the universe #Universe #astro-ph #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1016/j.physletb.2005.06.017
published as Phys.Lett.B619:193,2005 · 6 pages and 3 figures, discussion on dynamically evolving dilaton and modulus included, references added, version to appear in Physics Letters B
arxiv created 2005/06/09 · openalex publication_date 2005/06/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the evolution of (phantom) dark energy universe by taking into account the higher-order string corrections to Einstein–Hilbert action with fixed dilaton and modulus fields. While the presence of a cosmological constant gives stable de Sitter fixed points in the cases of heterotic and bosonic strings, no stable de Sitter solutions exist when a phantom fluid is present. We find that the universe can exhibit a Big Crunch singularity with a finite time for type II string, whereas it reaches a Big Rip singularity for heterotic and bosonic strings. Thus the fate of dark energy universe crucially depends upon the type of string theory under consideration.