Gravity from Local Lorentz Violation

Details Gravity from Local Lorentz Violation Gravity from Local Lorentz Violation

2005-10-29

arxiv.org/abs/gr-qc/0510124v1

Gen.Rel.Grav.37:1675-1679,2005; Int.J.Mod.Phys.D14:2341-2346,2005

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

6 pages, accepted in General Relativity and Gravitation

Scientific paper

10.1142/S021827180500811X

In general relativity, gravitational waves propagate at the speed of light, and so gravitons are massless. The masslessness can be traced to symmetry under diffeomorphisms. However, another elegant possibility exists: masslessness can instead arise from spontaneous violation of local Lorentz invariance. We construct the corresponding theory of gravity. It reproduces the Einstein-Hilbert action of general relativity at low energies and temperatures. Detectable signals occur for sensitive experiments, and potentially profound implications emerge for our theoretical understanding of gravity.

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