Self-tuning kinetic gravity braiding: Cosmological dynamics, shift symmetry, and the tadpole
arXiv:2101.00965 · doi:10.1088/1475-7516/2021/03/079
Abstract
We study the self-tuning subclass of kinetic gravity braiding and obtain robust predictions on self-tuning and dynamics in the tadpole-free shift symmetric sector of the theory. In particular, we show inevitability of cosmic acceleration, prove the dynamical stability of this late-time asymptotic state, and derive ghost and gradient stability constraints on the self-tuning vacuum. We discuss the results concretely in the context of generalized cubic covariant Galileon theory and an exponential kinetic gravity braiding.
32 pages, 11 figures, version accepted in JCAP
References in corpus (16)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Dark Energy after GW170817: dead ends and the road ahead
- Strong constraints on cosmological gravity from GW170817 and GRB 170817A
- Implications of the Neutron Star Merger GW170817 for Cosmological Scalar-Tensor Theories
- Imperfect Dark Energy from Kinetic Gravity Braiding
- Horndeski theory and beyond: a review
- G-inflation: inflation driven by the Galileon field
- Degenerate higher order scalar-tensor theories beyond Horndeski up to cubic order
- Galileon inflation
- xPert: Computer algebra for metric perturbation theory
- Galileon Gravity in Light of ISW, CMB, BAO and data
- The observational status of Galileon gravity after Planck
- Weakly-coupled stealth solution in scordatura degenerate theory
- Stealth black holes in shift symmetric kinetic gravity braiding
- Hair-dressing Horndeski: an approach to hairy solutions in cubic Horndeski gravity
- Vainshtein screening for slowly rotating stars