Bimetric gravity is cosmologically viable

By Yashar Akrami, S. F. Hassan, Frank Konnig, A. Schmidt-May, A. Solomon. 2015

155 citations recorded by the source corpus.

Bimetric theory describes gravitational interactions in the presence of an extra spin-2 field. Previous work has suggested that its cosmological solutions are generically plagued by instabilities. ...

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/7fad1a091ea2f0bc0ac2d406f343a44dc988ecea

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Citations in the corpus

Testing modified gravity at cosmological distances with LISA standard sirens (2019, background): “Bigravity admits FRW cosmological solutions describing late-time acceleration that differ from ΛCDM at the level of the background as well as for the dynamics of cosmological fluctuations [139–150].”
Cosmology and Fundamental Physics with the Euclid Satellite (2012, background): “Cosmological solutions can be made stable back to arbitrarily early times by taking one Planck mass to be much smaller than the other (Akrami et al. 2015), or by reintroducing a cosmological constant which is much larger than the bimetric interaction parameter (Könnig and Amendola 2014).”
Does the Hubble constant tension call for new physics? (2018, unknown): “Here, Mf = Mg through a rescaling of fμν and the βn [70, 71].”
A systematic approach to generalisations of General Relativity and their cosmological implications (2018, background): “– Another condition for the same purpose could be Mg Mf [199], even though one has to be careful with not lowering too much the strong-coupling scale.”
Dark Energy in Light of Multi-Messenger Gravitational-Wave Astronomy (2018, background): “This happens by choosing a large hierarchy between the two Planck masses: the so-obtained theory is practically indistinguishable fromGR plus a (technically natural) CC (Akrami et al., 2015).”
Heavy spin-2 Dark Matter (2016, background): “has previously been discussed in [46] and for small α in [47].”