Metric Redefinitions in Einstein-Aether Theory

Details Metric Redefinitions in Einstein-Aether Theory Metric Redefinitions in Einstein-Aether Theory

2005-02-14

arxiv.org/abs/gr-qc/0502066v2

Phys.Rev. D72 (2005) 044017

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages; v.2: Some clarifying remarks added, to appear in PRD

Scientific paper

10.1103/PhysRevD.72.044017

`Einstein-Aether' theory, in which gravity couples to a dynamical, time-like, unit-norm vector field, provides a means for studying Lorentz violation in a generally covariant setting. Demonstrated here is the effect of a redefinition of the metric and vector field in terms of the original fields and two free parameters. The net effect is a change of the coupling constants appearing in the action. Using such a redefinition, one of the coupling constants can be set to zero, simplifying studies of solutions of the theory.

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