10 papers
Bumpy horizons from non-linear sigma models
Fabrizio Canfora, Nicolás Grandi, Carla Henr\'ıquez-Báez +1
We show that black hole horizons with non-constant curvature can be constructed in any even dimension, when the source of the Einstein equations is given by the stress-energy tenso…
Hadronic lensing
Fabrizio Canfora, Cristóbal Corral, Borja Diez
We introduce an analytic approach to study gravitational lensing in the presence of a distribution of hadrons. The situation is analogous to the propagation of photons in a medium…
A smooth road to bumpy horizons: shaping black holes with non-linear sigma models, from supergravity to higher dimensions
Fabrizio Canfora, Nicolás Grandi, Carla HenrÃquez-Báez +1
We construct new families of solutions for General Relativity coupled to a general class of non-linear sigma models, some of which can be embedded in supergravity. The solutions in…
Self-dual instantons and gravitating dyons in non-Abelian ModMax theory
Fabrizio Canfora, Cristóbal Corral, Borja Diez +2
Motivated by the recent interest in conformal and duality invariant nonlinear electrodynamics, we study the non-Abelian extension of ModMax electrodynamics. The theory is parameter…
Non-perturbative corrections to the Casimir energy for a scalar field theory with non-linear boundary conditions
Fabrizio Canfora, David Dudal, Thomas Oosthuyse +3
We consider the case of a free real massive bulk scalar in D=4 dimensions, and embed two parallel plates as interfaces on which we impose non-linear boundary conditions, either Dir…
A Bogomol'nyi-Prasad-Sommerfield bound with a first-order system in the Gross-Pitaevskii equation
Fabrizio Canfora, Pablo Pais
A novel Bogomol'nyi-Prasad-Sommerfield (BPS) bound for the Gross-Pitaevskii equations in two spatial dimensions is presented. The energy can be bounded from below in terms of the c…