Cosmological backreaction of heavy string states

Abstract

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.

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

References in corpus (7)

• The Pre-Big Bang Scenario in String Cosmology
• Quantum Nature of the Big Bang
• Quantum Nature of the Big Bang: An Analytical and Numerical Investigation
• Assisting pre-big bang phenomenology through short-lived axions
• String production at the level of effective field theory
• Bouncing cosmology from Kalb-Ramond Braneworld
• Graceful exit via polymerization of pre-big bang cosmology