# Palatini Actions and Quantum Gravity Phenomenology

@article{Olmo2011PalatiniAA, title={Palatini Actions and Quantum Gravity Phenomenology}, author={Gonzalo J. Olmo}, journal={Journal of Cosmology and Astroparticle Physics}, year={2011}, volume={2011}, pages={018-018} }

We show that an invariant an universal length scale can be consistently intro- duced in a generally covariant theory through the gravitational sector using the Palatini approach. The resulting theory is able to capture different aspects of quantum gravity phenomenology in a single framework. In particular, it is found that in this theory field excitations propagating with different energy-densities perceive different background met- rics, which is a fundamental characteristic of the DSR and…

## 38 Citations

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It has recently been shown that f(R) theories formulated in the Palatini variational formalism are able to avoid the big bang singularity yielding instead a bouncing solution. The mechanism…

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Hypersurface deformation algebra consists of a fruitful approach to derive deformedsolutions of general relativity based on symmetry considerations with quantum-gravity effects,of which the…

### Quantum Configuration and Phase Spaces: Finsler and Hamilton Geometries

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In this paper, we reviewtwo approaches that can describe, in a geometrical way, the kinematics of particles that are affected by Planck-scale departures, named Finsler and Hamilton geometries. By…

### Cosmology of hybrid metric-Palatini f(X)-gravity

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- 2013

A new class of modified theories of gravity, consisting of the superposition of the metric Einstein-Hilbert Lagrangian with an f(ℛ) term constructed à la Palatini was proposed recently. The…

### Geometric Proca with matter in metric-Palatini gravity

- PhysicsThe European Physical Journal C
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In the present work, we study linear, torsion-free metric-Palatini gravity, extended by the quadratics of the antisymmetric part of the Ricci tensor and extended also by the presence of the affine…

### Palatini Approach to Modified Gravity: f(R) Theories and Beyond

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We review the recent literature on modified theories of gravity in the Palatini approach. After discussing the motivations that lead to consider alternatives to Einstein’s theory and to treat the…

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