Non-perturbative Gravity, Hagedorn Bounce & CMB

@article{Biswas2006NonperturbativeGH,
  title={Non-perturbative Gravity, Hagedorn Bounce \& CMB},
  author={Tirthabir Biswas and R. Brandenberger and A. Mazumdar and W. Siegel},
  journal={Journal of Cosmology and Astroparticle Physics},
  year={2006},
  volume={0712},
  pages={011}
}
In hep-th/0508194 it was shown how non-perturbative corrections to gravity can resolve the big bang singularity, leading to a bouncing universe. Depending on the scale of the non-perturbative corrections, the temperature at the bounce may be close to or higher than the Hagedorn temperature. If matter is made up of strings, then massive string states will be excited near the bounce, and the bounce will occur inside (or at the onset of) the Hagedorn phase for string matter. As we discuss in this… Expand

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