Cosmological backreaction of heavy string states

Details Cosmological backreaction of heavy string states Cosmological backreaction of heavy string states

2011-03-11

arxiv.org/abs/1103.2311v2

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, 1 figure, The discussion on the results has been extended. To be published on MPLA

Scientific paper

We propose a mechanism to have a smooth transition from a pre-Big Bang phase to a standard cosmological phase. Such transition is driven by gravitational production of heavy massive string states that backreact on the geometry to stop the growth of the curvature. Close to the string scale, particle creation can become effective because the string phase space compensate the exponential suppression of the particle production. Numerical solutions for the evolution of the Universe with this source are presented.

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