Viability of nonminimally coupled f (R) gravity
arXiv:1406.6422 · doi:10.1007/s10714-015-2002-5
Abstract
In this work we explore the viability of nonminimally coupled matter- curvature gravity theories, namely the conditions required for the absence of tachyon instabilities and ghost degrees of freedom. We contrast our finds with recent claims of a pathological behaviour of this class of models, which resorted to, in our view, an incorrect analogy with k-essence.
13 pages. Accepted for publication in General Relativity and Gravitation
References in corpus (14)
- Dynamics of dark energy
- Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
- Disappearing cosmological constant in f(R) gravity
- Low surface brightness galaxies rotation curves in the low energy limit of gravity : no need for dark matter?
- Perturbations in generalized multi-field inflation
- Nonminimal curvature-matter coupled wormholes with matter satisfying the null energy condition
- Ghosts, Instabilities, and Superluminal Propagation in Modified Gravity Models
- On the non-minimal gravitational coupling to matter
- Cosmographic Constraints and Cosmic Fluids
- Causality and the speed of sound
- Ghost Constraints on Modified Gravity
- Primordial Non-Gaussianities of General Multiple Field Inflation
- Note on the thermodynamics and the speed of sound of a scalar field
- Emerging the dark sector from thermodynamics of cosmological systems with constant pressure
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- Gravitational Waves on Charged Black Hole Backgrounds in Modified Gravity
- Density perturbations in nonminimally coupled gravity: symptoms of Lagrangian density ambiguity