48 citations · 190 across the 19 of their papers we have counts for
19 papers
Ergodic Hysteresis of the Kerr black hole spectrum
João Paulo Cavalcante, Maurício Richartz, Bruno Carneiro da Cunha
We uncover a cascade of exceptional points (EPs) in the quasinormal mode spectrum of massive scalar perturbations of Kerr black holes, revealing an intricate non-Hermitian structur…
Massive scalar perturbations in Kerr Black Holes: near extremal analysis
João Paulo Cavalcante, Maurício Richartz, Bruno Carneiro da Cunha
We study quasinormal modes of massive scalar perturbations in Kerr black holes using the isomonodromic method. For arbitrary scalar masses and black hole spins , we nume…
Exceptional point and hysteresis in perturbations of Kerr black holes
João Paulo Cavalcante, Maurício Richartz, Bruno Carneiro da Cunha
We employ the isomonodromic method to study linear scalar massive perturbations of Kerr black holes for generic scalar masses and generic black hole spins . We find that…
Scalar/Dirac perturbations of the Reissner-Nordström black hole and Painlevé transcendents
João Paulo Cavalcante, Bruno Carneiro da Cunha
We investigate spin- and spin- perturbations for non-extremal and extremal Reissner-Nordström backgrounds using the isomonodromic method. We calculate the fundament…
Remarks on holographic models of the Kerr-AdS geometry
Julián Barragán Amado, Bruno Carneiro da Cunha, Elisabetta Pallante
We study the low-temperature limit of scalar perturbations of the Kerr-AdS black-hole for generic rotational parameters. We motivate the study by considering real-time hologr…
On the Kerr-AdS/CFT correspondence
Julián Barragán Amado, Bruno Carneiro da Cunha, Elisabetta Pallante
We review the relation between four-dimensional global conformal blocks and field propagation in . Following the standard argument that marginal perturbations should b…
Large gravitons and near-horizon diffeomorphisms
Bruno Carneiro da Cunha, Filipe Rudrigues
Usual gauge fixing procedures in classical general relativity rely on the existence of solutions of a second order wave equation. We propose to use the equation to relate asymptoti…
Kerr-de Sitter Greybody Factors via Isomonodromy
Bruno Carneiro da Cunha, Fábio Novaes
Scattering data can be generically described in terms of monodromies. Here we obtain scattering amplitudes for conformally coupled scalar fields in Kerr-de Sitter black holes using…
On the Existence of Monodromies for the Rabi model
Bruno Carneiro da Cunha, Manuela Carvalho de Almeida, Amilcar Rabelo de Queiroz
We discuss the existence of monodromies associated with the singular points of the eigenvalue problem for the Rabi model. The complete control of the full monodromy data requires t…
Kerr Scattering Coefficients via Isomonodromy
Bruno Carneiro da Cunha, Fábio Novaes
We study the scattering of a massless scalar field in a generic Kerr background. Using a particular gauge choice based on the current conservation of the radial equation, we give a…
Coupling the Sorkin-Johnston State to Gravity
Nicolás Avilán, Andrés F. Reyes-Lega, Bruno Carneiro da Cunha
We consider the dynamics of the Sorkin-Johnston (SJ) state for a massless scalar field in two dimensions. We conduct a study of the renormalized stress-tensor by a subtraction proc…
On the Six-dimensional Kerr Theorem and Twistor Equation
Bruno Carneiro da Cunha
The Kerr theorem is revisited as part of the twistor program in six dimensions. The relationship between pure spinors and integrable 3-planes is investigated. The real condition fo…
Killing Horizons and Spinors
Bruno Carneiro da Cunha, Amilcar de Queiroz
We study the near horizon geometry of generic Killing horizons constructing suitable coordinates and taking the appropriate scaling limit. We are able to show that the geometry wil…
Holography as Cutoff: a proposal for measure of inflationary universes
Fábio Novaes, Bruno Carneiro da Cunha
We propose the holographic principle as a dynamical cutoff for any quantum theory of gravity with a geometric description at low energies, incorporating ideas of effective field th…
Spinors and the Weyl Tensor Classification in Six Dimensions
Carlos Batista, Bruno Carneiro da Cunha
A spinorial approach to 6-dimensional differential geometry is constructed and used to analyze tensor fields of low rank, with special attention to the Weyl tensor. We perform a st…
Kerr-CFT From Black-Hole Thermodynamics
Bruno Carneiro da Cunha, Amilcar R. de Queiroz
We analyze the near-horizon limit of a general black hole with two commuting killing vector fields in the limit of zero temperature. We use black hole thermodynamics methods to rel…
Dwelling on de Sitter
Bruno Carneiro da Cunha
A careful reduction of the three-dimensional gravity to the Liouville description is performed, where all gauge fixing and on-shell conditions come from the definition of asymptoti…
Three Dimensional de Sitter Gravity and the Correspondence
Bruno Carneiro da Cunha
Certain aspects of three dimensional asymptotically de Sitter spaces are studied, with emphasis on the mapping between gravity observables and the representation of the conformal s…
Inflation and Holography in String Theory
Bruno Carneiro da Cunha
The encoding of an inflating patch of space-time in terms of a dual theory is discussed. Following Bousso's interpretation of the holographic principle, we find that those are gene…