REVIEW 3 cited by
Instability of anisotropic cosmological solutions supported by vector fields
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
Models with vector fields acquiring a non-vanishing vacuum expectation value along one spatial direction have been proposed to sustain a prolonged stage of anisotropic accelerated expansion. Such models have been used for realizations of early time inflation, with a possible relation to the large scale CMB anomalies, or of the late time dark energy. We show that, quite generally, the concrete realizations proposed so far are plagued by instabilities (either ghosts, or unstable growth of the linearized perturbations) which can be ultimately related to the longitudinal vector polarization present in them. Phenomenological results based on these models are therefore unreliable.
Forward citations
Cited by 3 Pith papers
-
Linear and nonlinear supersymmetry in field and string theory
Consistency criteria for constrained superfields, a gravitino energy and particle-production puzzle, the unique leading-order massive spin-2 to supergravity coupling, and a twisted Scherk-Schwarz orientifold with full...
-
A no-go theorem in bumblebee vector-tensor cosmology
Bumblebee gravity with non-minimal couplings is healthy only under the degeneracy σ=-ξ/2, which fixes the potential and yields a stealth de Sitter solution with scalar sound speed squared ≈1/6.
-
Observational constraints on vector-like dark energy
Pantheon and H(z) data force the cosmic triad vector dark energy model to sit very close to the LambdaCDM limit.
Discussion (0). Continue with ORCID to comment.