Bianchi type I cosmology with a Kalb-Ramond background field

Abstract

An effect of the Lorentz symmetry breaking is pointed out in the cosmological context. Using a Bianchi I geometry coupled to the Kalb-Ramond field, a consequence of the Lorentz symmetry violation is indicated by a different rate of expansion in a given spatial direction. This article focuses on the coupling constant ${\xi }_1$, which generates, from the Kalb-Ramond field, all three coefficients that give rise to the Lorentz violation in the gravity sector of the minimal Standard Model Extension. The coupling constant ${\xi }_1$ increases the rate of expansion of the universe in a given direction during a dark energy era. As a consequence, a range of validity of that coupling constant is also obtained.

9 pages, 1 figure. V3 with minor changes. Published in The European Physical Journal C

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• Compact stars admitting Finch-Skea symmetry in the presence of various matter fields
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• Beyond general relativity: gravitational waves in non-minimally coupled theories