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Ghost Free Mimetic Massive Gravity

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arxiv 1805.06283 v2 pith:AX4G5RCQ submitted 2018-05-16 hep-th astro-ph.CO

Ali H. Chamseddine , Viatcheslav Mukhanov This is my paper · ORCID
classification hep-thastro-ph.CO
keywords ghostgravitymimeticfieldsfreefreedommassmassive
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The mass of the graviton can be generated using a Brout-Englert-Higgs mechanism with four scalar fields. We show that when one of these fields is costrained as in mimetic gravity, the massive gravity obtained is ghost free and consistent. The mass term is not of the Fierz-Pauli type. There are only five degrees of freedom and the sixth degree of freedom associated with the Boulware-Deser ghost is constrained and replaced by mimetic matter to all orders. The van Dam-Veltman-Zakharov discontinuity is also absent.

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  1. Two-field mimetic gravity revisited and Hamiltonian analysis

    gr-qc 2019-09 conditional novelty 6.0 of 10

    A two-field mimetic gravity model has two scalar degrees of freedom, not one, and the extra entropy mode is a ghost when the fields have opposite-sign kinetic terms.

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