271 citations · 1.1k across the 35 of their papers we have counts for
23 papers · 1 filter
Semiclassical decay of de Sitter space into black holes with vortex-deformed horizons
Andrés Gomberoff, Carla Henríquez-Baez, Aldo Vera
We study the decay of de Sitter space into black holes whose horizons are dressed by BPS vortices of a action. The process is mediated by a regular Euclidean instan…
Exact black holes and black branes with bumpy horizons supported by superfluid pions
Fabrizio Canfora, Andrés Gomberoff, Carla Henríquez-Baez +1
We present exact solutions of the Einstein non-linear sigma model in spacetime dimensions, describing bumpy black holes and black branes. Using an Ansatz for superflu…
Analytic meronic black holes, gravitating solitons and higher spins in the Einstein -Yang-Mills theory
Fabrizio Canfora, Andrés Gomberoff, Marcela Lagos +1
We construct meronic black holes and solitons in the Einstein -Yang-Mills theory in and dimensions. These analytical solutions are found by combining the general…
Meronic Einstein-Yang-Mills black hole in 5D and gravitational spin from isospin effect
Fabrizio Canfora, Andrés Gomberoff, Seung Hun Oh +2
We construct an analytic black hole solution in Einstein-Yang-Mills theory in five dimensions supporting a Meron field. The gauge field is proportional to a pure gauge and…
Regge-Teitelboim analysis of the symmetries of electromagnetic and gravitational fields on asymptotically null spacelike surfaces
Claudio Bunster, Andrés Gomberoff, Alfredo Pérez
We present a new application of the Regge-Teitelboim method for treating symmetries which are defined asymptotically. It may be regarded as complementary to the one in their origin…
On AdS to dS transitions in higher-curvature gravity
Xian O. Camanho, Jose D. Edelstein, Andres Gomberoff +1
We study the possible existence of gravitational phase transitions from AdS to dS geometries in the context of higher-curvature gravities. We use Lanczos-Gauss-Bonnet (LGB) theory…
Generalized phase transitions in Lovelock gravity
Xian O. Camanho, Jose D. Edelstein, Gaston Giribet +1
We investigate a novel mechanism for phase transitions that is a distinctive feature of higher-curvature gravity theories. For definiteness, we bound ourselves to the case of Lovel…
Three-dimensional Bondi-Metzner-Sachs invariant two-dimensional field theories as the flat limit of Liouville theory
Glenn Barnich, Andrés Gomberoff, Hernán A. González
In the gravitational context, Liouville theory is the two-dimensional conformal field theory that controls the boundary dynamics of asymptotically AdS_3 spacetimes at the classical…
New type of phase transition in gravitational theories
Xian O. Camanho, Jose D. Edelstein, Gaston Giribet +1
We set forth a new type of phase transition that might take place in gravitational theories whenever higher-curvature corrections are considered. It can be regarded as a sophistica…
Extended Charged Events and Chern-Simons Couplings
Claudio Bunster, Andrés Gomberoff, Marc Henneaux
Recently, the concept of dynamical extended charged events has been introduced, and it has been argued that they should play as central a role as that played by particles or ordina…
Counting the negative eigenvalues of the thermalon in three dimensions
Rodrigo Aros, Andres Gomberoff, Alejandra Montecinos
Some years ago it was shown that the cosmological constant may be reduced by thermal production of membranes that, after nucleation, collapse into a black hole. The probability of…
Dyons with potentials: duality and black hole thermodynamics
Glenn Barnich, Andres Gomberoff
A modified version of the double potential formalism for the electrodynamics of dyons is constructed. Besides the two vector potentials, this manifestly duality invariant formulati…
Three dimensional origin of Godel spacetimes and black holes
Maximo Banados, Glenn Barnich, Geoffrey Compere +1
We construct Godel-type black hole and particle solutions to Einstein-Maxwell theory in 2+1 dimensions with a negative cosmological constant and a Chern-Simons term. On-shell, the…
The 2+1 charged black hole in topologically massive Electrodynamics
T. Andrade, M. Banados, R. Benguria +1
The 2+1 black hole coupled to a Maxwell field can be charged in two different ways. On the one hand, it can support a Coulomb field whose potential grows logarithmically in the rad…
Decay of the Cosmological Constant. Equivalence of Quantum Tunneling and Thermal Activation in Two Spacetime Dimensions
Andres Gomberoff, Marc Henneaux, Claudio Teitelboim
We study the decay of the cosmological constant in two spacetime dimensions through production of pairs. We show that the same nucleation process looks as quantum mechanical tunnel…
Black Holes in de Sitter Space: Masses, Energies and Entropy Bounds
Alejandro Corichi, Andres Gomberoff
In this paper we consider spacetimes in vacuum general relativity --possibly coupled to a scalar field-- with a positive cosmological constant . We employ the Isolated Horizons…
Thermal Decay of the Cosmological Constant into Black Holes
Andres Gomberoff, Marc Henneaux, Claudio Teitelboim +1
We show that the cosmological constant may be reduced by thermal production of membranes by the cosmological horizon, analogous to a particle ``going over the top of the potential…
de Sitter Black Holes with Either of the Two Horizons as a Boundary
Andres Gomberoff, Claudio Teitelboim
The action and the thermodynamics of a rotating black hole in the presence of a positive cosmological constant are analyzed. Since there is no spatial infinity, one must bring in,…
Quantization of the Chern-Simons Coupling Constant
Xavier Bekaert, Andres Gomberoff
We investigate the quantum consistency of p-form Maxwell-Chern-Simons electrodynamics in 3p+2 spacetime dimensions (for p odd). These are the dimensions where the Chern--Simons ter…
Turning the Cosmological Constant into Black Holes
Andres Gomberoff, Marc Henneaux, Claudio Teitelboim
It is known that there is a quantum mechanical tunneling process which, through nucleation of a membrane, induces a transition between two de Sitter spaces, lowering the cosmologic…
On group averaging for non-compact groups
Andres Gomberoff
We review some aspects of the use of a technique known as group averaging, which provides a tool for the study of constrained systems. We focus our attention on the case where the…
Brane Transmutation in Supergravity
Andres Gomberoff, Donald Marolf
We study a family of BPS solutions of type IIA supergravity that can be interpreted as describing the `transmutation' of a Neveu-Schwarz five-brane into a D4-brane in the presence…
Anti-de Sitter space and black holes
Maximo Banados, Andres Gomberoff, Cristian Martinez
Anti-de Sitter space with identified points give rise to black-hole structures. This was first pointed out in three dimensions, and generalized to higher dimensions by Aminneborg e…