Horava-Lifshitz gravity: detailed balance revisited
arXiv:1112.3385 · doi:10.1103/PhysRevD.85.064003
Abstract
We attempt a critical reconsideration of "detailed balance" as a principle that can be used to restrict the proliferation of couplings in Horava-Lifshitz gravity. We re-examine the shortcomings that have been usually associated with it in the literature and we argue that easy remedies can be found for all of them within the framework of detailed balance, and that the most persistent of them are actually related to projectability. We show that, once projectability is abandoned, detailed balance reduces the number of independent couplings by roughly an order of magnitude and imposes only one restriction that constitutes a phenomenological concern: the size of the (bare) cosmological constant is unacceptably large. Remarkably, this restriction (which is present in the projectable version as well) has been so far under-appreciated in the literature. Optimists might prefer to interpret it as a potential blessing in disguise, as it allows one to entertain the idea of a miraculous cancelation between the bare cosmological constant and the (still poorly understood) vacuum energy contribution.
v1: 9 pages; v2: typos corrected, minor rephrasings, published version
References in corpus (17)
- Quantum Gravity at a Lifshitz Point
- Models of non-relativistic quantum gravity: the good, the bad and the healthy
- Strong coupling in Horava gravity
- Horava-Lifshitz Cosmology: A Review
- On the Extra Mode and Inconsistency of Horava Gravity
- Phenomenologically viable Lorentz-violating quantum gravity
- Lorentz symmetry breaking as a quantum field theory regulator
- Horava-Lifshitz gravity: a status report
- Probing quantum gravity using photons from a flare of the active galactic nucleus Markarian 501 observed by the MAGIC telescope
- Lorentz Violation for Photons and Ultra-High Energy Cosmic Rays
- Cuscuton and low energy limit of Horava-Lifshitz gravity
- Lorentz Violation and Ultrahigh-Energy Photons
- Planck-scale Lorentz violation constrained by Ultra-High-Energy Cosmic Rays
- Projectable Horava-Lifshitz gravity in a nutshell
- Stability of spin-0 graviton and strong coupling in Horava-Lifshitz theory of gravity
- Status of Horava gravity: A personal perspective
- Nonlinear superhorizon perturbations in Horava-Lifshitz gravity
Cited by in corpus (29)
- Tests of Lorentz invariance: a 2013 update
- Bouncing Cosmology in f(Q) Symmetric Teleparallel Gravity
- Hořava Gravity at a Lifshitz Point: A Progress Report
- Black holes in Lorentz-violating gravity theories
- Hořava Gravity after GW170817
- A no-go theorem for slowly rotating black holes in Horava-Lifshitz gravity
- Scale hierarchy in Horava-Lifshitz gravity: a strong constraint from synchrotron radiation in the Crab nebula
- Post-Newtonian approximations in the Hořava-Lifshitz gravity with extra U(1) symmetry
- Causality and black holes in spacetimes with a preferred foliation
- Calculations of three-nucleon reactions with N3LO chiral forces: achievements and challenges
- Revisiting the cuscuton as a Lorentz-violating gravity theory
- Extended phase-space analysis of the Horava-Lifshitz cosmology
- Horava gravity with mixed derivative terms
- Cosmological constraints on Hořava gravity revised in light of GW170817 and GRB170817A and the degeneracy with massive neutrinos
- Evolution and spherical collapse in Einstein-aether theory and Horava gravity
- Horava-Lifshitz gravity with detailed balance
- On power-counting renormalizability of Hořava gravity with detailed balance
- Renormalizability of alternative theories of gravity: differences between power counting and entropy argument
- Quark stars with isotropic matter in Hořava gravity and Einstein-æther theory
- FLRW Cosmology with Horava-Lifshitz Gravity: Impacts of Equations of State
- IR Horava-Lifshitz gravity coupled to Lorentz violating matter: A spectral action approach
- Extrinsic curvature in 2-dimensional Causal Dynamical Triangulation
- Anisotropic fluid spheres in Hořava gravity and Einstein-æther theory with a non-static æther
- Hořava's quantum gravity illustrated by embedding diagrams of the Kehagias-Sfetsos spacetimes
- Relativistic polytropic equations of state in Hořava gravity and Einstein-æther theory
- Minimal-supersymmetric extended inflation field in Horava-Lifshitz gravity
- Resolution of cosmological singularity in Hořava-Lifshitz cosmology
- Black hole horizons at the extremal limit in Lorentz-violating gravity
- On the energy flow of in Hořava-Lifshitz cosmology