The failure of cosmological perturbation theory in the new ekpyrotic and cyclic ekpyrotic scenarios

摘要

Cosmological perturbation theory fails in the new ekpyrotic and cyclic ekpyrotic scenarios, before the scale factor of the Universe reaches zero. As a result, a recently-proposed,recipe for evolving the curvature perturbation through the bounce in these scenarios cannot be justified. (C) 2002 Published by Elsevier Science B.V. [References: 25]