Massive Gravity Acausality Redux
High Energy Physics - Theory
2015-06-16 v3 General Relativity and Quantum Cosmology
Abstract
Massive gravity (mGR) is a 5(=2s+1) degree of freedom, finite range extension of GR. However, amongst other problems, it is plagued by superluminal propagation, first uncovered via a second order shock analysis. First order mGR shock structures have also been studied, but the existence of superluminal propagation in that context was left open. We present here a concordance of these methods, by an explicit (first order) characteristic matrix computation, which confirms mGR's superluminal propagation as well as acausality.
Keywords
Cite
@article{arxiv.1306.5457,
title = {Massive Gravity Acausality Redux},
author = {S. Deser and K. Izumi and Y. C. Ong and A. Waldron},
journal= {arXiv preprint arXiv:1306.5457},
year = {2015}
}
Comments
16 pages LaTeX, references added, Physics Letters B version