159 citations · 2k across the 45 of their papers we have counts for
5 papers · 1 filter
Vainshtein Screening in Bimetric Cosmology
Marvin Lüben, Angnis Schmidt-May, Juri Smirnov
We demonstrate that the instabilities in linear cosmological perturbations in bimetric theory are the manifestation of the non-linear Vainshtein mechanism on an FRW background. The…
Decoherence of Gravitational Wave Oscillations in Bigravity
Kevin Max, Moritz Platscher, Juri Smirnov
Following up on our recent study, we consider the regime of graviton masses and gravitational wave propagation distances at which decoherence of the wave packets plays a major role…
Gravitational Wave Oscillations in Bigravity
Kevin Max, Moritz Platscher, Juri Smirnov
We derive consistent equations for gravitational wave oscillations in bigravity. In this framework a second dynamical tensor field is introduced in addition to General Relativity a…
Degravitation of the Cosmological Constant in Bigravity
Moritz Platscher, Juri Smirnov
In this article the phenomenon of degravitation of the cosmological constant is studied in the framework of bigravity. It is demonstrated that despite a sizable value of the cosmol…
Gauge-Invariant Average of Einstein Equations for finite Volumes
Juri Smirnov
For the study of cosmological backreacktion an avaragng procedure is required. In this work a covariant and gauge invariant averaging formalism for finite volumes will be developed…