Bimetric gravity doubly coupled to matter: theory and cosmological implications
classification
✦ hep-th
astro-ph.COgr-qc
keywords
gravitycosmologicalcoupledimplicationsmattertheoryaccelerationbimetric
read the original abstract
A ghost-free theory of gravity with two dynamical metrics both coupled to matter is shown to be consistent and viable. Its cosmological implications are studied, and the models, in particular in the context of partially massless gravity, are found to explain the cosmic acceleration without resorting to dark energy.
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