The Closed String Tachyon and its relationship with the evolution of the Universe

Abstract

We present a cosmological landscape where the classical closed string tachyon field plays an important role in the framework of a critical bosonic compactification. Our cosmological solutions for a universe with constant curvature describes an finite inflationary stage which expands till a maximum value before undergoes a big crunch as the tachyon reaches the minimum of its potential.

arXiv comment2 pages, to appear in the Proceedings of the 13th Marcel Grossman Meeting (Stockholm, Sweden, July 1-7 2012), invited talk at the Parallel Session CM4 "Quantum Cosmology and Quantum Effects in the Early Universe"