Towards a Future Singularity?
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/ρ≥-1. The discussion is based on an often neglected aspect of scalar-tensor models of gravity: the fact that different test particles may follow the geodesics of different metric frames, and the need for a frame-independent regularization of curvature singularities.
- Publication:
-
International Journal of Modern Physics D
- Pub Date:
- 2004
- DOI:
- 10.1142/S0218271804006310
- arXiv:
- arXiv:gr-qc/0405083
- Bibcode:
- 2004IJMPD..13.2267G
- Keywords:
-
- Dark energy;
- phantom energy;
- string cosmology;
- dilaton;
- General Relativity and Quantum Cosmology;
- Astrophysics;
- High Energy Physics - Theory
- E-Print:
- 8 pages. Essay written for the "2004 Awards for Essays on Gravitation" (Gravity Research Foundation, Wellesley Hills, MA, USA), and selected for "Honorable Mention"