Covariant cosmological perturbation dynamics in the large-scale limit

Abstract

Using the existence of a covariant conserved quantity on large perturbation scales in a spatially flat perfect fluid or scalar field universe, we present a general formula for gauge-invariantly defined comoving energy density perturbations which encodes the entire linear perturbation dynamics in a closed time integral. On this basis we discuss perturbation modes in different cosmological epochs.

4 pages, Revtex, to appear in PRD

References in corpus (2)

• Cosmological perturbations in the inflationary Universe
• Cosmological perturbation theory and conserved quantities in the large-scale limit

Cited by in corpus (1)

• A conserved variable in the perturbed hydrodynamic world model