This article is cited in 135 papers

Exact solution in a string cosmological model

I. Ya. Aref'eva^a, S. Yu. Vernov^b, A. S. Koshelev<sup>a

a</sup> Steklov Mathematical Institute, Russian Academy of Sciences
^b Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University

Abstract: We construct an exact solution of the Friedmann equations with a phantom scalar matter field originating in string field theory and show the absence of the big-rip singularity. The notable features of the model are a ghost sign of the kinetic term and a special polynomial form of the effective tachyon potential. The constructed solution is stable under small fluctuations of the initial conditions and special variations of the form of the potential.

Keywords: strings, string field theory, cosmology, branes, tachyon, phantom, dark energy, big rip.

Received: 10.10.2005

DOI: 10.4213/tmf2055

 English version: Theoretical and Mathematical Physics, 2006, 148:1, 895–909

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