Accelerating Universe and Cosmological Perturbation in the Ghost Condensate

Abstract

In the simplest Higgs phase of gravity called ghost condensation, an accelerating universe with a phantom era (w<-1) can be realized without ghost or any other instabilities. In this paper we show how to reconstruct the potential in the Higgs sector Lagrangian from a given cosmological history (H(t), ρ(t)). This in principle allows us to constrain the potential by geometrical information of the universe such as supernova distance-redshift relation. We also derive the evolution equation for cosmological perturbations in the Higgs phase of gravity by employing a systematic low energy expansion. This formalism is expected to be useful to test the theory by dynamical information of large scale structure in the universe such as cosmic microwave background anisotropy, weak gravitational lensing and galaxy clustering.

30 pages; typos corrected; version accepted for publication in JCAP

References in corpus (17)

• Starting the Universe: Stable Violation of the Null Energy Condition and Non-standard Cosmologies
• On the Growth of Perturbations as a Test of Dark Energy
• Spontaneous breaking of Lorentz invariance, black holes and perpetuum mobile of the 2nd kind
• Ghosts, Instabilities, and Superluminal Propagation in Modified Gravity Models
• Ghost conditions for Gauss-Bonnet cosmologies
• Lorentz Violating Inflation
• Lorentz-violating graviton masses: getting around ghosts, low strong coupling scale and VDVZ discontinuity
• Spontaneous Lorentz Breaking at High Energies
• Mimicking Lambda with a spin-two ghost condensate
• Searching for modified gravity with baryon oscillations: from SDSS to wide field multiobject spectroscopy (WFMOS)
• The Classical Stability Of The Ghost Condensate
• Testing Lorentz Invariance Violation in Quantum Gravity Theories
• Ghost condensate model of flat rotation curves
• Regulator Dependence of the Proposed UV Completion of the Ghost Condensate
• Gravitational lensing due to dark matter modelled by vector field
• Ghost Condensation in the Brane-World
• Ghost Condensation and Gravity in Higgs Phase

Cited by in corpus (19)

• Effective Field Theory for Inflation
• Infrared-modified gravities and massive gravitons
• The Effective Theory of Quintessence: the w<-1 Side Unveiled
• Holographic Ricci dark energy: Current observational constraints, quintom feature, and the reconstruction of scalar-field dark energy
• Reconstructing holographic quintessence
• A Matter Bounce By Means of Ghost Condensation
• Agegraphic dark energy as a quintessence
• Holographic tachyon model
• Internal space structure generalization of the quintom cosmological scenario
• Lorentz Breaking Massive Gravity in Curved Space
• Holographic dark energy in the DGP braneworld with GO cutoff
• Possible theoretical limits on holographic quintessence from weak gravity conjecture
• Reconstructing a String-Inspired Quintom Model of Dark Energy
• Null Energy Condition Violation and Classical Stability in the Bianchi I Metric
• The Effective Field Theory of Vector-Tensor Theories
• Nonlinear superhorizon perturbations of non-canonical scalar field
• Alternative approach to the Starobinsky model for inflation scenarios
• Spontaneous Lorentz Violation, Negative Energy and the Second Law of Thermodynamics
• Space, Time, and Tachyon Condensation