We discuss whether the future extrapolation of the present cosmological state may lead to a singularity even in case of "conventional" (negative) pressure of the dark energy field, namely w = p/p greater than or equal to -1. The discussion is based on an often neglected aspect of scalar-tensor models of gravity: the fact that different test paxticles may follow the geodesics of different metric frames, and the need for a frame-independent regularization of curvature singularities.
Towards a future singularity?
GASPERINI, Maurizio
2004-01-01
Abstract
We discuss whether the future extrapolation of the present cosmological state may lead to a singularity even in case of "conventional" (negative) pressure of the dark energy field, namely w = p/p greater than or equal to -1. The discussion is based on an often neglected aspect of scalar-tensor models of gravity: the fact that different test paxticles may follow the geodesics of different metric frames, and the need for a frame-independent regularization of curvature singularities.File in questo prodotto:
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