2013/01/17 by Flavio S. Coelho, Flávio S. Coelho, Carlos Herdeiro +7
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Noncommutative and Quantum Gravity Theories #gr-qc #hep-th
paper · pdf · doi:10.48550/arxiv.1301.4045
To appear in the Proceedings of the Thirteenth Marcel Grossman Meeting on General Relativity
arxiv created 2013/01/17 · openalex publication_date 2013/01/17 · arxiv updated 2013/01/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a new model of gravity which explicitly breaks Lorentz-invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree of freedom. We discuss its cosmology, exact solutions and the dynamics of the scalar mode. We show that it predicts inflation without an inflaton and admits the black hole solutions of General Relativity (GR). We argue that the scalar mode is well behaved and contains none of the pathologies previously found in similar models.