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arXiv · hep-th/9705061

Exact solutions in two-dimensional string cosmology with back reaction

Sukanta Bose·Sayan Kar
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Abstract

We present analytic cosmological solutions in a model of two-dimensional dilaton gravity with back reaction. One of these solutions exhibits a graceful exit from the inflationary to the FRW phase and is nonsingular everywhere. A duality related second solution is found to exist only in the ``pre-big-bang'' epoch and is singular at $τ= 0$. In either case back reaction is shown to play a crucial role in determining the specific nature of these geometries.

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Sukanta Bose, Sayan Kar. 1997-09-04. Exact solutions in two-dimensional string cosmology with back reaction. https://doi.org/10.1103/physrevd.56.r4444

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