48 citations · 179 across the 14 of their papers we have counts for
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Bimetric interactions based on metric congruences
Mikica Kocic
In massive gravity and bigravity, spin-2 interactions are defined in terms of a square root matrix that involves two metrics. In this work, the interactions are constructed using a…
Causal propagation of constraints in bimetric relativity in standard 3+1 form
Mikica Kocic
The goal of this work was to investigate the propagation of the constraints in the ghost-free bimetric theory where the evolution equations are in standard 3+1 form. It is establis…
Geometric mean of bimetric spacetimes
Mikica Kocic
We use the geometric mean to parametrize metrics in the Hassan-Rosen ghost-free bimetric theory and pose the initial-value problem. The geometric mean of two positive definite symm…
On Birkhoff's theorem in ghost-free bimetric theory
Mikica Kocic, Marcus Högås, Francesco Torsello +1
We consider the Hassan-Rosen bimetric field equations in vacuum when the two metrics share a single common null direction in a spherically symmetric configuration. By solving these…
Algebraic Properties of Einstein Solutions in Ghost-Free Bimetric Theory
Mikica Kocic, Marcus Högås, Francesco Torsello +1
A known fact is that an Einstein solution in one sector in ghost-free bimetric theory implies an Einstein solution in the other sector. Earlier studies have also shown that some cl…
On the local structure of spacetime in ghost-free bimetric theory and massive gravity
S. F. Hassan, Mikica Kocic
The ghost-free bimetric theory describes interactions of gravity with another spin-2 field in terms of two Lorentzian metrics. However, if the two metrics do not admit compatible n…
Absence of ghost in a new bimetric-matter coupling
S. F. Hassan, Mikica Kocic, Angnis Schmidt-May
Interactions in bimetric theory, which can describe gravity in the presence of an extra spin-2 field, are severely constrained by the requirement of the absence of the Boulware-Des…