Consistent Bimetric Theory and its Application to Cosmology

Abstract

Recently, the construction of ghost-free nonlinear massive spin-2 interactions solved a long outstanding problem in classical field theory. The consistent formulation requires a second rank-two tensor (or metric) and therefore has the form of a bimetric theory. Besides providing the solution to an old problem in field theory, ghost-free bimetric theory also has an interesting phenomenology: Its homogeneous and isotropic background solutions can reproduce the expansion history of the universe without any input of vacuum energy.

arXiv comment4 pages, to appear in the proceedings of the conference "Rencontres de Moriond", Cosmology Session, 2014; minor changes, references added

References in corpus (4)

• Perturbations in Massive Gravity Cosmology
• Massive Gravity Acausality Redux
• FRW Cosmological Perturbations in Massive Bigravity
• Instability in a minimal bimetric gravity model

Cited by in corpus (1)

• On couplings to matter in massive (bi-)gravity