Cosmological implications of bumblebee vector models

Abstract

The bumblebee model of spontaneous Lorentz symmetry breaking is explored in a cosmological context, considering a single nonzero time component for the vector field. The relevant dynamic equations for the evolution of the Universe are derived and their properties and physical significance studied. We conclude that a late-time de Sitter expansion of the Universe can be replicated, and attempt to constrain the parameter of the potential driving the spontaneous symmetry breaking.

GUP modified Hawking radiation in bumblebee gravity

“…For other studies demonstrating the physical effects (quasinormal modes, thermodynamics, etc.) of the bumblebee field, the reader may refer to [33][34][35][36][37][38][39][40][41][42] and references therein.…”

Inflation with a massive vector field nonminimally coupled to gravity

“…[10,12,13,14], but with a nonminimal coupling between the vector field and both the Ricci scalar and Ricci tensor [15]. The latter is also found in the similar context posited by the so-called bumblebee vector models for spontaneous breaking of Lorentz symmetry [16,17,18,19,20].…”

Gödel-type universes in bumblebee gravity

“…The action that captures the most relevant features of the bumblebee model describes the coupling between the bumblebee field and geometry and the presence of a general potential. A discussion of the symmetries of a model with couplings of the form B µ B ν R µν and B µ B µ R has been presented [9,30]. It is interesting to note that the choice of the potential can have implications for the parameters of the theory.…”