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Exact solution in a string cosmological model. (English) Zbl 1177.83129

Theor. Math. Phys. 148, No. 1, 895-909 (2006); translation from Teor. Mat. Fiz. 148, No. 1, 23-41 (2006).
Summary: 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.

MSC:

83F05 Relativistic cosmology
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