Graceful exit in quantum string cosmology

M. Gasperini; J. Maharana; G. Veneziano

doi:10.1016/0550-3213(96)00201-5

Graceful exit in quantum string cosmology

High Energy Physics - Theory 2009-10-30 v1 Astrophysics General Relativity and Quantum Cosmology

Authors: M. Gasperini , J. Maharana , G. Veneziano

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Abstract

We write an O(d,d)-covariant Wheeler-De Witt equation in the ( $d^2+1$ )-dimensional minisuperspace of low-energy cosmological string backgrounds. We discuss explicit examples of transitions between two duality-related cosmological phases, and we find a finite quantum transition probability even when the two phases are classically separated by a curvature singularity. This quantum approach is completely free from operator ordering ambiguities as a consequence of the duality symmetries of the string effective action.

Keywords

quantum cosmology quantum gravity string theory

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@article{arxiv.hep-th/9602087,
  title  = {Graceful exit in quantum string cosmology},
  author = {M. Gasperini and J. Maharana and G. Veneziano},
  journal= {arXiv preprint arXiv:hep-th/9602087},
  year   = {2009}
}

Comments

16 pages, LATEX. A complete collection of papers and references on the pre-big-bang scenario in string cosmology is available at http://www.to.infn.it/teorici/gasperini/

Graceful exit in quantum string cosmology

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