Duality in string cosmology Academic Article uri icon


  • Scale factor duality, a truncated form of time dependent T-duality, is a symmetry of string effective action in cosmological backgrounds interchanging small and large scale factors. The symmetry suggests a cosmological scenario (“pre-big-bang”) in which two duality related branches, an inflationary branch and a decelerated The use of scale factor duality in the analysis of the higher derivative corrections to the effective action, and consequences for the nature of exit transition, between the inflationary and decelerated branches, are …

publication date

  • January 1, 1999