Stability of the aether
arXiv:1008.4351 · doi:10.1103/PhysRevD.82.081501
Abstract
The requirements for stability of a Lorentz violating theory are analyzed. In particular we conclude that Einstein-aether theory can be stable when its modes have any phase velocity, rather than only the speed of light as was argued in a recent paper.
4 pages. v2: matches PRD version