2009/03/30 by P. P. Avelino, D. Bazeia, L. Losano +3
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Flatness (cosmology) #Formalism (music) #Inflation (cosmology) #Inflaton #Lorentz transformation #Mathematical physics #Noncommutative and Quantum Gravity Theories #Physics #Quantum mechanics #Theoretical physics #astro-ph.CO #astro-ph.HE #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.79.123503
published as Phys.Rev.D79:123503,2009 · 6 pages, no figures
arxiv created 2009/03/30 · openalex publication_date 2009/06/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
This work deals with the dynamics of inflation in the context of a scalar-vector-tensor theory of gravity exhibiting spontaneous Lorentz violation at early times. We describe a first-order formalism which we use to obtain new exact Lorentz violating inflationary solutions for a broad family of models, some in the absence of a potential for the inflaton field. Our results show that different conditions are required to solve the horizon and flatness problems. In particular, we find a necessary condition for inflation to provide a solution to both problems and we show that in inflationary models with no inflaton potential a period of superinflation might be necessary to solve the flatness problem.