Graceful exit in quantum string cosmology
高能物理 - 理论
2009-10-30 v1 天体物理学
广义相对论与量子宇宙学
摘要
We write an O(d,d)-covariant Wheeler-De Witt equation in the ()-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.
引用
@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}
}
备注
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/