Examinando por Autor "Arias, Cesar"
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Ítem Bosonic higher spin gravity in any dimension with dynamical two-form(Journal of High Energy Physics, 2019-03-01) Arias, Cesar; Bonezzi, Roberto; Sundell, PerWe alter Vasiliev’s original bosonic higher spin gravity in any dimension beyond the linearized level by factoring out a modified sp(2) gauge algebra. The new model can be embedded together with a dynamical two-form and an extra dynamical one-form into a flat Quillen superconnection. Further duality and sp(2) ghost extensions lead to a FrobeniusChern-Simons action in which the sp(2) and higher spin gauge symmetries are subsumed into a unified Cartan gauge group at the fully non-linear level.Ítem Gibbons-Hawking entropy as entanglement entropy(2019-10) Arias, Cesar; Diaz, Felipe; Sundell, PerWe consider a deformed version of four-dimensional de Sitter spacetime. The setup consist of two (antipodal) disconnected Rindler observers, each one with an S4 topology. We show that the two observers have an entanglement entropy, in the low energy sector, given by a quarter of the area of a pair minimal surfaces, that corresponds to the set of fixed points of an Zq orbifold. The result matches with the Gibbons-Hawking entropy when we restrict the Zq action to a single Rindler wedge. © 2019 Author(s).