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Bimetric Gravity from Ghost-free Massive Gravity
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Physics Department and Institute for Strings, Cosmology, and Astroparticle Physics, Columbia University, New York .
2012 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 1202, 126- p.Article in journal (Refereed) Published
Abstract [en]

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.
National Category
Astronomy, Astrophysics and Cosmology Subatomic Physics
Research subject
Physics; Theoretical Physics
Identifiers
URN: urn:nbn:se:su:diva-86399DOI: 10.1007/JHEP02(2012)126OAI: oai:DiVA.org:su-86399DiVA: diva2:586891
Available from: 2013-01-13 Created: 2013-01-13 Last updated: 2017-12-06Bibliographically approved

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Publisher's full texthttp://arxiv.org/abs/arXiv:1109.3515

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Hassan, S. Fawad
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