On the Transfer of Adiabatic Fluctuations through a Nonsingular Cosmological Bounce

Abstract

We study the transfer of cosmological perturbations through a nonsingular cosmological bounce in a special model in which the parameters of the bounce and the equation of state of matter are chosen such as to allow for an exact calculation of the evolution of the fluctuations. We find that the growing mode of the metric fluctuations in the contracting phase goes over into the growing mode in the expanding phase, a result which is different from what is obtained in analyses in which fluctuations are matched at a singular hypersurface. Consequences for Ekpyrotic cosmology are discussed in a limit when the equation of state of a fluid becomes large.

Discussion on Mukhanov variable and curvature perturbation added

References in corpus (8)

• New Ekpyrotic Cosmology
• Gauge invariant MSSM inflaton
• Generating Ekpyrotic Curvature Perturbations Before the Big Bang
• String Gas Cosmology and Structure Formation
• A non inflationary model with scale invariant cosmological perturbations
• Cosmological Perturbations on a Bouncing Brane
• On the Transfer of Metric Fluctuations when Extra Dimensions Bounce or Stabilize
• K-Bounce

Cited by in corpus (8)

• Towards a Nonsingular Bouncing Cosmology
• A Matter Bounce By Means of Ghost Condensation
• The Matter Bounce Alternative to Inflationary Cosmology
• Thermal Fluctuations and Bouncing Cosmologies
• Processing of Cosmological Perturbations in a Cyclic Cosmology
• Cosmological Perturbations on a Bouncing Brane
• Adiabatic fluctuations from cosmic strings in a contracting universe
• Origin & evolution of the Universe