Consistency of Relevant Cosmological Deformations on all Scales

Details Consistency of Relevant Cosmological Deformations on all Scales Consistency of Relevant Cosmological Deformations on all Scales

2011-04-13

arxiv.org/abs/1104.2534v1

JCAP 1109:024,2011

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, 4 figures

Scientific paper

10.1088/1475-7516/2011/09/024

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 violating negative norm states in the weak coupling regime from sub- to super-Hubble scales. This demonstrates that the recently proposed classical self-protection mechanism of deformed gravity extends to the entire kinematical domain.

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