Exact solutions in two-dimensional string cosmology with back reaction

Details Exact solutions in two-dimensional string cosmology with back reaction Exact solutions in two-dimensional string cosmology with back reaction

1997-05-10

arxiv.org/abs/hep-th/9705061v2

Phys.Rev.D56:4444-4448,1997

Physics

High Energy Physics

High Energy Physics - Theory

Shortened slightly, references added, to appear in Physical Review D (Rapid Communications). 16 pages, RevTex, 3 PostScript fi

Scientific paper

10.1103/PhysRevD.56.R4444

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 $\tau = 0$. In either case back reaction is shown to play a crucial role in determining the specific nature of these geometries.

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