The fate of (phantom) dark energy universe with string curvature corrections
The fate of (phantom) dark energy universe with string curvature corrections
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DOI：
10.1016/j.physletb.2005.06.017
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发表时间：
2005-04
影响因子：
4.4
通讯作者：
M. Sami;A. Toporensky;Peter V. Tretjakov;S. Tsujikawa
中科院分区：
文献类型：
--
作者：
M. Sami;A. Toporensky;Peter V. Tretjakov;S. Tsujikawa
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.
