Cosmic gravitational wave background in string cosmology Academic Article uri icon


  • A robust prediction of models of string cosmology which realize the pre-big-bang scenario 1, 2 is that our present-day universe contains a cosmic gravitational wave background 3'4, 5, with a spectrum which is quite different than that predicted by many other early-universe cosmological models6, 7, 8, 9. In the pre-big-bang scenario the evolution of the universe starts from a state of very small curvature and coupling and then undergoes a long phase of dilaton-driven kinetic inflation reaching roughly Planckian energy densities10, and at …

publication date

  • April 30, 1998