Self-accelerating Universe in modified gravity with dynamical torsion
arXiv:1606.02565 · doi:10.1103/PhysRevD.95.024013
Abstract
We consider a model belonging to the class of gravities with dynamical torsion. The model is free of ghosts and gradient instabilities about Minkowski and torsionless Einstein backgrounds. We find that at zero cosmological constant, the model admits a self-accelerating solution with non-Riemannian connection. Small value of the effective cosmological constant is obtained at the expense of the hierarchy between the dimensionless couplings.
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- Conservation of energy-momentum of matter as the basis for the gauge theory of gravitation
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- Non-linearly ghost-free higher curvature gravity
- Einstein gravity with torsion induced by the scalar field
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- Mimetic-Metric-Torsion with induced Axial mode and Phantom barrier crossing
- Cosmological Dark sector from a Mimetic-Metric-Torsion perspective
- Stability of self-accelerating Universe in modified gravity with dynamical torsion: the case of small background torsion
- Dynamical torsion gravity backgrounds
- Spherically symmetric perturbations of a Schwarzschild black hole in torsion bigravity