Expanding and contracting universes in third quantized string cosmology
High Energy Physics - Theory
2019-08-17 v1 General Relativity and Quantum Cosmology
Abstract
We discuss the possibility of quantum transitions from the string perturbative vacuum to cosmological configurations characterized by isotropic contraction and decreasing dilaton. When the dilaton potential preserves the sign of the Hubble factor throughout the evolution, such transitions can be represented as an anti-tunnelling of the Wheeler--De Witt wave function in minisuperspace or, in a third-quantization language, as the production of pairs of universes out of the vacuum.
Cite
@article{arxiv.hep-th/9701146,
title = {Expanding and contracting universes in third quantized string cosmology},
author = {A. Buonanno and M. Gasperini and M. Maggiore and C. Ungarelli},
journal= {arXiv preprint arXiv:hep-th/9701146},
year = {2019}
}
Comments
11 pages, LATEX, to apper in Class. Quantum Grav. An updated collection of papers on the pre-big bang scenario in string cosmology is a available at http://www.to.infn.it/teorici/gasperini