Chi-Variable-Speed-of-Light Cosmologies

Details Chi-Variable-Speed-of-Light Cosmologies Chi-Variable-Speed-of-Light Cosmologies

2000-01-27

arxiv.org/abs/astro-ph/0001481v1

Nucl.Phys.Proc.Suppl. 88 (2000) 259-262

Astronomy and Astrophysics

Astrophysics

4 pages, use esprc2.sty. Talk given at the 3rd Meeting on Constrained Dynamics and Quantum Gravity (QG 99), Villasimius, Sardi

Scientific paper

10.1016/S0920-5632(00)00780-5

Variable-Speed-of-Light (VSL) cosmologies are currently attracting much interest as a possible alternative to cosmological inflation. We discuss the fundamental geometrodynamic aspects of VSL cosmologies, and provide several alternative implementations. These implementations provide a large class of VSL cosmologies that pass the zeroth-order consistency tests of being compatible with both classical Einstein gravity and low-energy particle physics. While they solve the ``kinematic'' puzzles as well as inflation does, VSL cosmologies typically do not solve the flatness problem since in their purest form no violation of the strong energy condition occurs. Nevertheless, these models are easy to unify with inflation.

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