84 citations · 429 across the 17 of their papers we have counts for
17 papers
Holographic Observables at Large
Dimitrios Giataganas, Nikolaos Pappas, Nicolaos Toumbas
We study holographically non-local observables in field theories at finite temperature and in the large limit. These include the Wilson loop, the entanglement entropy, as well…
Large and Ultra-compact Gauss-Bonnet Black Holes with a Self-interacting Scalar Field
Athanasios Bakopoulos, Panagiota Kanti, Nikolaos Pappas
We consider the Einstein-scalar-Gauss-Bonnet theory, and study the case where a negative cosmological constant is replaced by a more realistic, negative scalar-field potential. We…
Incorporating Physical Constraints in Braneworld Black-String Solutions for a Minkowski Brane in Scalar-Tensor Gravity
Theodoros Nakas, Panagiota Kanti, Nikolaos Pappas
In the framework of a general scalar-tensor theory, where the scalar field is non-minimally coupled to the five-dimensional Ricci scalar curvature, we investigate the emergence of…
On the Existence of Solutions with a Horizon in Pure Scalar-Gauss-Bonnet Theories
Athanasios Bakopoulos, Panagiota Kanti, Nikolaos Pappas
We consider the Einstein-scalar-Gauss-Bonnet theory and assume that, at regimes of large curvature, the Ricci scalar may be ignored compared to the quadratic Gauss-Bonnet term. We…
New Black-String Solutions for an Anti-de Sitter Brane in Scalar-Tensor Gravity
Theodoros Nakas, Nikolaos Pappas, Panagiota Kanti
We consider a five-dimensional theory with a scalar field non-minimally-coupled to gravity, and we look for novel black-string solutions in the bulk. By appropriately choosing the…
Anti-Gravitating Brane-World Solutions for a de Sitter Brane in Scalar-Tensor Gravity
Panagiota Kanti, Theodoros Nakas, Nikolaos Pappas
In the context of a five-dimensional theory with a scalar field non-minimally-coupled to gravity, we look for solutions that describe novel black-string or maximally-symmetric solu…
Hawking Radiation Spectra for Scalar Fields by a Higher-Dimensional Schwarzschild-de-Sitter Black Hole
T. Pappas, P. Kanti, N. Pappas
In this work, we study the propagation of scalar fields in the gravitational background of a higher-dimensional Schwarzschild-de-Sitter black hole as well as on the projected-on-th…
On the Localisation of 4-Dimensional Brane-World Black Holes II: the general case
P. Kanti, N. Pappas, T. Pappas
We perform a comprehensive analysis of a number of scalar field theories in a attempt to find analytically 5-dimensional, localised-on-the-brane, black-hole solutions. Extending a…
Greybody Factors for Scalar Fields emitted by a Higher-Dimensional Schwarzschild-de-Sitter Black-Hole
Panagiota Kanti, Thomas Pappas, Nikolaos Pappas
In this work, we consider the propagation of scalar particles in a higher-dimensional Schwarzschild-de-Sitter black-hole spacetime, both on the brane and in the bulk. Our analysis…
The black hole challenge in Randall-Sundrum II model
Nikolaos D. Pappas
Models postulating the existence of additional spacelike dimensions of macroscopic or even infinite size, while viewing our observable universe as merely a 3-brane living in a high…
A little quantum help for cosmic censorship and a step beyond all that
Nikolaos Pappas
The hypothesis of cosmic censorship (CCH) plays a crucial role in classical general relativity, namely to ensure that naked singularities would never emerge, since it predicts that…
On the Localisation of 4-Dimensional Brane-World Black Holes
P. Kanti, N. Pappas, K. Zuleta
In the context of brane-world models, we pursue the question of the existence of 5-dimensional solutions describing regular black holes localised close to the brane. Employing a pe…
Angular profile of Particle Emission from a Higher-dimensional Black Hole: Analytic Results
Panagiota Kanti, Nikolaos Pappas
During the spin-down phase of the life of a higher-dimensional black hole, the emission of particles on the brane exhibits a strong angular variation with respect to the rotation a…
On the preservation of unitarity during black hole evolution and information extraction from its interior
Nikolaos D. Pappas
For more than 30 years the discovery that black holes radiate like black bodies of specific temperature has triggered a multitude of puzzling questions concerning their nature and…
A new approach to information loss (no) problem for Black Holes
Nikolaos D. Pappas
The discovery that black holes emit thermal type radiation changed radically our perception of their behavior. Until then, their interior was considered as causally disconnected fr…
Emission of Massive Scalar Fields by a Higher-Dimensional Rotating Black-Hole
P. Kanti, N. Pappas
We perform a comprehensive study of the emission of massive scalar fields by a higher-dimensional, simply rotating black hole both in the bulk and on the brane. We derive approxima…
Graviton Emission in the Bulk by a Simply Rotating Black Hole
P. Kanti, Hideo Kodama, R. A. Konoplya +2
In this work, we study the emission of tensor-type gravitational degrees of freedom from a higher-dimensional, simply rotating black hole in the bulk. The decoupled radial part of…