Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Valdivia, Omar"'
Starting from the isomorphism between the AdS Carroll and Poincar\'e algebras, we map the three-dimensional asymptotically flat solutions of Poincar\'e gravity into an AdS Carroll spacetime. We show the mapped solutions satisfy the field equations of
Externí odkaz:
http://arxiv.org/abs/2407.14457
The stationary black hole solution of a Chern-Simons model based on the semi-simple extension of the Poincar\'e gauge group is studied. The solution resembles the metric properties of the BTZ geometry but contains, in addition, non-vanishing torsion.
Externí odkaz:
http://arxiv.org/abs/2308.09114
Allowing for a nonvanishing spin tensor for cold dark matter ($\omega_{\mathrm{DM}}=0$) has the consequence of giving rise to an effective $\mathrm{FLRW}$ dynamics with a small negative barotropic constant for an effective dark matter density ($-1/3<
Externí odkaz:
http://arxiv.org/abs/2004.13163
Autor:
Barrientos, José, Cordonier-Tello, Fabrizio, Corral, Cristóbal, Izaurieta, Fernando, Medina, Perla, Rodríguez, Eduardo, Valdivia, Omar
Publikováno v:
Phys. Rev. D 100, 124039 (2019)
Scalar-tensor gravity theories with a nonminimal Gauss-Bonnet coupling typically lead to an anomalous propagation speed for gravitational waves, and have therefore been tightly constrained by multimessenger observations such as GW170817/GRB170817A. I
Externí odkaz:
http://arxiv.org/abs/1910.00148
We offer a mathematical toolkit for the study of waves propagating on a background manifold with nonvanishing torsion. Examples include electromagnetic and gravitational waves on a spacetime with torsion. The toolkit comprises generalized versions of
Externí odkaz:
http://arxiv.org/abs/1903.04712
In order to study gravitational waves in any realistic astrophysical scenario, one must consider geometry perturbations up to second order. Here, we present a general technique for studying linear and quadratic perturbations on a spacetime with torsi
Externí odkaz:
http://arxiv.org/abs/1901.06400
Publikováno v:
In Physics of the Dark Universe May 2023 40
Autor:
Concha, Patrick, Merino, Nelson, Rodríguez, Evelyn, Salgado-Rebolledo, Patricio, Valdivia, Omar
Publikováno v:
JHEP 1902 (2019) 002
In this work we present a BMS-like ansatz for a Chern-Simons theory based on the semi-simple enlargement of the Poincar\'e symmetry, also known as AdS-Lorentz algebra. We start by showing that this ansatz is general enough to contain all the relevant
Externí odkaz:
http://arxiv.org/abs/1810.12256
Autor:
Concha, Patrick, Merino, Nelson, Miskovic, Olivera, Rodríguez, Evelyn, Salgado-Rebolledo, Patricio, Valdivia, Omar
Publikováno v:
JHEP 10 (2018) 079
We study a three-dimensional Chern-Simons gravity theory based on the Maxwell algebra. We find that the boundary dynamics is described by an enlargement and deformation of the $\mathfrak{bms}_3$ algebra with three independent central charges. This sy
Externí odkaz:
http://arxiv.org/abs/1805.08834
Autor:
Barrientos, José, Cordonier-Tello, Fabrizio, Izaurieta, Fernando, Medina, Perla, Narbona, Daniela, Rodríguez, Eduardo, Valdivia, Omar
Publikováno v:
Phys. Rev. D 96, 084023 (2017)
The Horndeski Lagrangian brings together all possible interactions between gravity and a scalar field that yield second-order field equations in four-dimensional spacetime. As originally proposed, it only addresses phenomenology without torsion, whic
Externí odkaz:
http://arxiv.org/abs/1703.09686