Geodesic
Exact solution in a string cosmological model
Teoretičeskaâ i matematičeskaâ fizika, Tome 148 (2006) no. 1, pp. 23-41

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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. 
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     author = {I. Ya. Aref'eva and S. Yu. Vernov and A. S. Koshelev},
     title = {Exact solution in a string cosmological model},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
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     publisher = {mathdoc},
     volume = {148},
     number = {1},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2006_148_1_a2/}
}
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I. Ya. Aref'eva; S. Yu. Vernov; A. S. Koshelev. Exact solution in a string cosmological model. Teoretičeskaâ i matematičeskaâ fizika, Tome 148 (2006) no. 1, pp. 23-41. http://geodesic.mathdoc.fr/item/TMF_2006_148_1_a2/