Bimetric Gravity from Ghost-free Massive Gravity
2012 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, Vol. 1202, 126- p.Article in journal (Refereed) Published
Generically, non-linear bimetric theories of gravity suffer from the same Boulware-Deser ghost instability as non-linear theories of massive gravity. However, recently proposed theories of massive gravity have been shown to be ghost-free. These theories are formulated with respect to a flat, non-dynamical reference metric. In this work we show that it is possible to give dynamics to the reference metric in such a way that the consistency of the theory is maintained. The result is a non-linear bimetric theory of a massless spin-2 field interacting with a massive spin-2 field that is free of the Boulware-Deser ghost. To our knowledge, this is the first construction of such a ghost-free bimetric theory.
Place, publisher, year, edition, pages
2012. Vol. 1202, 126- p.
Astronomy, Astrophysics and Cosmology Subatomic Physics
Research subject Physics; Theoretical Physics
IdentifiersURN: urn:nbn:se:su:diva-86399DOI: 10.1007/JHEP02(2012)126OAI: oai:DiVA.org:su-86399DiVA: diva2:586891