Examinando por Autor "Guilleminot, Pablo"

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    Constant curvature black holes in Einstein-AdS gravity: Conserved quantities
    (American Physical Society, 2017-06) Guilleminot, Pablo; Olea, Rodrigo; Petrov, Alexander N.
    We study physical properties of constant curvature black holes in Einstein-anti-de Sitter (AdS) gravity. These objects, which are locally AdS throughout the space, are constructed from identifications of global AdS spacetime, in a similar fashion as the Banados-Teitelboim-Zanelli black hole in three dimensions. We find that, in dimensions equal to or greater than 4, constant curvature black holes have zero mass and angular momentum. Only in odd dimensions are we able to associate a nonvanishing conserved quantity to these solutions, which corresponds to the vacuum (Casimir) energy of the spacetime. © 2017 American Physical Society.
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    Thin shell dynamics in Lovelock gravity
    (Institute for Ionics, 2022-11) Guilleminot, Pablo; Merino, Nelson; Olea, Rodrigo
    We study matching conditions for a spherically symmetric thin shell in Lovelock gravity which can be read off from the variation of the corresponding first-order action. In point of fact, the addition of Myers’ boundary terms to the gravitational action eliminates the dependence on the acceleration in this functional and such that the canonical momentum appears in the surface term in the variation of the total action. This procedure leads to junction conditions given by the discontinuity of the canonical momentum defined for an evolution normal to the boundary.In particular, we correct existing results in the literature for the thin shell collapse in generic Lovelock theories, which were mistakenly drawn from an inaccurate analysis of the total derivative terms in the system. © 2022, The Author(s).