A Cosmological Interpretation of Duality
arXiv:hep-th/9311080 · doi:10.1016/0370-2693(94)90654-8
Abstract
We study the cosmological meaning of duality symmetry by considering a two dimensional model of string cosmology. We find that as seen by an internal observer in this universe, the scale factor rebounds at the self-dual length. This rebound is a consequence of the adiabatic expansion. Furthermore, in this situation there are four mathematically different scenarios which describe physically equivalent universes which are in fact indistinguishable. We also stress that -duality suffices to prove that all possible evolutions present a maximum temperature.
9 pages, LaTeX, CERN-TH.7085/93 FTUOV-100/93 (Some misprints are corrected, two references are added and a small change to clarify the reasoning on p. 4 is made)