PREPRINT
509FCDA8-2ECC-4608-A477-ECE32EA4A08F

Graceful exit in quantum string cosmology

M. Gasperini, J. Maharana, G. Veneziano
arXiv:hep-th/9602087

Submitted on 16 February 1996

Abstract

We write an O(d,d)-covariant Wheeler-De Witt equation in the (d2+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.

Preprint

Comment: 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/

Subjects: High Energy Physics - Theory; Astrophysics; General Relativity and Quantum Cosmology

URL: https://arxiv.org/abs/hep-th/9602087