306 citations · 2.6k across the 51 of their papers we have counts for
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Island of Stability for Consistent Deformations of Einstein's Gravity
Felix Berkhahn, Dennis Dietrich, Stefan Hofmann +2
We construct explicitly deformations of Einstein's theory of gravity that are consistent and phenomenologically viable since they respect, in particular, cosmological backgrounds.…
Consistency of Relevant Cosmological Deformations on all Scales
Felix Berkhahn, Dennis D. Dietrich, Stefan Hofmann
Using cosmological perturbation theory we show that the most relevant defor- mation of gravity is consistent at the linear level. In particular, we prove the absence of uni- tarity…
Cosmological Classicalization: Maintaining Unitarity under Relevant Deformations of the Einstein-Hilbert Action
Felix Berkhahn, Dennis D. Dietrich, Stefan Hofmann
Generic relevant deformations of Einstein's gravity theory contain additional degrees of freedom that have a multi-facetted stabilization dynamics on curved spacetimes. We show tha…