TY - JOUR
T1 - The fate of (phantom) dark energy universe with string curvature corrections
AU - Sami, M.
AU - Toporensky, Alexey
AU - Tretjakov, Peter V.
AU - Tsujikawa, Shinji
N1 - Funding Information:
We thank O. Bertolami, G. Calcagni, F. Fattoev, T. Naskar, S. Nojiri and T. Padmanabhan for useful discussions. A.T. acknowledges support from IUCAA's “Program for enhanced interaction with the Africa–Asia–Pacific Region”. The work of S.T. was supported by JSPS (No. 30318802).
PY - 2005/7/21
Y1 - 2005/7/21
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=21544451160&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=21544451160&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2005.06.017
DO - 10.1016/j.physletb.2005.06.017
M3 - Article
AN - SCOPUS:21544451160
SN - 0370-2693
VL - 619
SP - 193
EP - 200
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 3-4
ER -