A conserved variable in the perturbed hydrodynamic world model

Abstract

We introduce a scalar-type perturbation variable $\Phi$ which is conserved in the large-scale limit considering general sign of three-space curvature ($K$), the cosmological constant ($\Lambda$), and time varying equation of state. In a pressureless medium $\Phi$ is {\it exactly conserved} in all scales.

4 pages, no figure, To appear in Phys. Rev. D

References in corpus (4)

• Cosmological perturbations in the inflationary Universe
• Cosmological perturbation theory and conserved quantities in the large-scale limit
• The Origin of Structures in Generalized Gravity
• Covariant cosmological perturbation dynamics in the large-scale limit

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