Ghost free mimetic massive gravity
نویسندگان
چکیده
منابع مشابه
Towards singularity- and ghost-free theories of gravity.
We present the most general covariant ghost-free gravitational action in a Minkowski vacuum. Apart from the much studied f(R) models, this includes a large class of nonlocal actions with improved UV behavior, which nevertheless recover Einstein's general relativity in the IR.
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S. Deser* Physics Department, Brandeis University, Waltham Massachusetts 02454, USA and Lauritsen Laboratory, California Institute of Technology, Pasadena California 91125, USA (Received 28 April 2009; published 2 September 2009) Canonical analysis of a recently proposed linearþ quadratic curvature gravity model in D 1⁄4 3 establishes its pure, irreducibly fourth derivative, quadratic curvature...
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We review recent progress in massive gravity. We start by showing how different theories of massive gravity emerge from a higher-dimensional theory of general relativity, leading to the Dvali-Gabadadze-Porrati model (DGP), cascading gravity, and ghost-free massive gravity. We then explore their theoretical and phenomenological consistency, proving the absence of Boulware-Deser ghosts and review...
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We consider a generalisation of the DGP model, by adding a second brane with localised curvature, and allowing for a bulk cosmological constant and brane tensions. We study radion and graviton fluctuations in detail, enabling us to check for ghosts and tachyons. By tuning our parameters accordingly, we find bigravity models that are free from ghosts and tachyons. These models will lead to large...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2018
ISSN: 1029-8479
DOI: 10.1007/jhep06(2018)060