The String and the Cosmic Bounce
1 Department of Physics “E.R. Caianiello”, University of Salerno, Italy
2 Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Italy
a e-mail: firstname.lastname@example.org
Published online: 10 April 2014
String theory introduces a new fundamental scale (the string length) that is expected to regularize the singularities of classical general relativity. In a cosmological context, the Big Bang is no longer regarded as the beginning of time, but just a transition between a Pre-Big Bang collapse phase and the current expansion. We will review old and recent attempts to build consistent bouncing cosmologies inspired to string theories, discussing their solved and unsolved problems, focussing on the observables that may distinguish them from standard inflationary scenarios.
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