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Galileon Radiation from Binary Systems
Claudia de Rham, Andrew Matas, Andrew J. Tolley
We calculate the power emitted in scalar modes for a binary systems, including binary pulsars, with a conformal coupling to the most general Galileon effective field theory by cons…
Low-Energy Effective Field Theory for Chromo-Natural Inflation
Emanuela Dimastrogiovanni, Matteo Fasiello, Andrew J. Tolley
Chromo-natural inflation is a novel model of inflation which relies on the existence of non-abelian gauge fields interacting with an axion. In its simplest realization, an SU(2) ga…
Effective field theory and non-Gaussianity from general inflationary states
Nishant Agarwal, R. Holman, Andrew J. Tolley +1
We study the effects of non-trivial initial quantum states for inflationary fluctuations within the context of the effective field theory for inflation constructed by Cheung et al.…
Brane Stabilization and Regionality of Extra Dimensions
David M. Jacobs, Glenn D. Starkman, Andrew J. Tolley
Extra dimensions are a common feature of beyond the Standard Model physics. In a braneworld scenario, local physics on the brane can depend strongly on the brane's location within…
Higher derivative theories with constraints : Exorcising Ostrogradski's Ghost
Tai-jun Chen, Matteo Fasiello, Eugene A. Lim +1
We prove that the linear instability in a non-degenerate higher derivative theory, the Ostrogradski instability, can only be removed by the addition of constraints if the original…
Cosmological perturbations in Massive Gravity and the Higuchi bound
Matteo Fasiello, Andrew J. Tolley
In de Sitter spacetime there exists an absolute minimum for the mass of a spin-2 field set by the Higuchi bound m^2 \geq 2H^2. We generalize this bound to arbitrary spatially flat…
Brane Localization and Stabilization via Regional Physics
David M. Jacobs, Glenn D. Starkman, Andrew J. Tolley
Extra-dimensional scenarios have become widespread among particle and gravitational theories of physics to address several outstanding problems, including cosmic acceleration, the…
Massive Gravity Theories and limits of Ghost-free Bigravity models
Miguel F. Paulos, Andrew J. Tolley
We construct a class of theories which extend New Massive Gravity to higher orders in curvature in any dimension. The lagrangians arise as limits of a new class of bimetric theorie…