Resolving the van Dam-Veltman-Zakharov and strong coupling problems in massive gravity and bigravity
نویسندگان
چکیده
منابع مشابه
Fully Covariant Van Dam - Veltman - Zakharov Discontinuity , and Absence Thereof
In both old and recent literature, it has been argued that the celebrated van Dam-Veltman-Zakharov (vDVZ) discontinuity of massive gravity is an artifact due to linearization of the true equations of motion. In this letter, we investigate that claim. First, we exhibit an explicit –albeit somewhat arbitrary– fully covariant set of equations of motion that, upon linearization, reduce to the stand...
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We prove that the van Dam-Veltman-Zakharov discontinuity arising in the massless limit of massive gravity theories is peculiar to Minkowski space and it is not present in Anti De Sitter space, where the massless limit is smooth. More generally, the massless limit is smooth whenever the square of the graviton mass vanishes faster than the cosmological constant.
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Adding explicit mass terms for the spin 2 and spin 3/2 field of N = 1 anti-de Sitter supergravity, the limit M → 0 for these mass terms is smooth: there is no van DamVeltman-Zakharov mass discontinuity in the propagators when the cosmological constant is non-vanishing.
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Bigravity is a natural arena where a non-linear theory of massive gravity can be formulated. If the interaction between the metrics f and g is non-derivative, spherically symmetric exact solutions can be found. At large distances from the origin, these are generically Lorentz-breaking bi-flat solutions (provided that the corresponding vacuum energies are adjusted appropriately). The spectrum of...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2019
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.100.124017