Island of Stability for Consistent Deformations of Einstein's Gravity

Dennis D. Dietrich, Felix Berkhahn, Stefan Hofmann, Florian Kühnel, Parvin Moyassari

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Abstrakt

We construct deformations of general relativity that are consistent and phenomenologically viable, since they respect, in particular, cosmological backgrounds. These deformations have unique symmetries in accordance with their Minkowski cousins (Fierz-Pauli theory for massive gravitons) and incorporate a background curvature induced self-stabilizing mechanism. Self-stabilization is essential in order to guarantee hyperbolic evolution in and unitarity of the covariantized theory, as well as the deformation's uniqueness. We show that the deformation's parameter space contains islands of absolute stability that are persistent through the entire cosmic evolution.
OriginalsprogEngelsk
TidsskriftPhysical Review Letters
Vol/bind108
Udgave nummer13
Antal sider4
ISSN0031-9007
DOI
StatusUdgivet - 2012

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