Homogeneous and isotropic big rips?

Abstract

We investigate the way big rips are approached in a fully inhomogeneous description of the space-time geometry. If the pressure and energy densities are connected by a (supernegative) barotropic index, the spatial gradients and the anisotropic expansion decay as the big rip is approached. This behaviour is contrasted with the usual big-bang singularities. A similar analysis is performed in the case of sudden (quiescent) singularities and it is argued that the spatial gradients may well be non-negligible in the vicinity of pressure singularities.

8 pages

References in corpus (5)

• Properties of singularities in (phantom) dark energy universe
• More General Sudden Singularities
• Geodesic behavior of sudden future singularities
• New Isotropic and Anisotropic Sudden Singularities
• Inhomogenized sudden future singularities

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• Dark energy, integrated Sachs-Wolfe effect and large-scale magnetic fields
• Why CMB physics?
• Gradient expansion, curvature perturbations and magnetized plasmas
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