136 citations · 480 across the 14 of their papers we have counts for
14 papers
Taming the Aretakis instability: extremal black holes with multi-degenerate horizons
Shreyansh Agrawal, Panagiotis Charalambous, Laura Donnay +2
Stationary black hole geometries with non-degenerate Cauchy horizons are classically unstable due to mass inflation. At extremality, mass inflation is absent, but a different dynam…
Generalized Couch--Torrence inversions
Panagiotis Charalambous, Laura Donnay, Alexandru Lupsasca
The Laplace equation on Euclidean flat space admits a discrete radial inversion symmetry. In 1983, Couch and Torrence (CT) found -- surprisingly -- that the massless wave equation…
Null infinity as an inverted extremal horizon: Matching an infinite set of conserved quantities for gravitational perturbations
Shreyansh Agrawal, Panagiotis Charalambous, Laura Donnay
Every spacetime that is asymptotically flat near null infinity can be conformally mapped via a spatial inversion onto the geometry around an extremal, non-rotating and non-expandin…
Love numbers of black p-branes: fine tuning, Love symmetries, and their geometrization
Panagiotis Charalambous, Sergei Dubovsky, Mikhail M. Ivanov
We compute scalar static response coefficients (Love numbers) of non-dilatonic black -brane solutions in higher dimensional supergravity. This calculation revels a fine-tuning b…
Celestial algebra in Einstein-Yang-Mills theory
Shreyansh Agrawal, Panagiotis Charalambous, Laura Donnay
From a study of the subleading structure of the asymptotic equations of motion in Einstein-Yang-Mills theory, we construct charges that are conserved up to quadratic order in non-r…
Magic zeroes in the black hole response problem and a Love symmetry resolution
Panagiotis Charalambous
In this thesis, we present the emergence of an ("Love") symmetry in the suitably defined near-zone region, relevant for studying the black hole response problem. This sym…
Love numbers and Love symmetries for -form and gravitational perturbations of higher-dimensional spherically symmetric black holes
Panagiotis Charalambous
The static Love numbers of four-dimensional asymptotically flat, isolated, general-relativistic black holes are known to be identically vanishing. The Love symmetry proposal sugges…
Scalar Love numbers and Love symmetries of 5-dimensional Myers-Perry black holes
Panagiotis Charalambous, Mikhail M. Ivanov
The near-zone ``Love'' symmetry resolves the naturalness issue of black hole Love number vanishing with representation theory. Here, we general…
Love symmetry
Panagiotis Charalambous, Sergei Dubovsky, Mikhail M. Ivanov
Perturbations of massless fields in the Kerr-Newman black hole background enjoy a (``Love'') SL symmetry in the suitably defined near zone approximation. We present…
Hidden Symmetry of Vanishing Love
Panagiotis Charalambous, Sergei Dubovsky, Mikhail M. Ivanov
We show that perturbations of massless fields in the Kerr black hole background enjoy a hidden ("Love") symmetry in the properly defined near zone a…
On the Vanishing of Love Numbers for Kerr Black Holes
Panagiotis Charalambous, Sergei Dubovsky, Mikhail M. Ivanov
It was shown recently that the static tidal response coefficients, called Love numbers, vanish identically for Kerr black holes in four dimensions. In this work, we confirm this re…
Simulating twisted mass fermions at physical light, strange and charm quark masses
Constantia Alexandrou, Simone Bacchio, Panagiotis Charalambous +11
We present the QCD simulation of the first gauge ensemble of two degenerate light quarks, a strange and a charm quark with all quark masses tuned to their physical values within th…
Comments on the entropic gravity proposal
Sourav Bhattacharya, Panagiotis Charalambous, Theodore N Tomaras +1
Explicit tests are presented of the conjectured entropic origin of the gravitational force. The gravitational force on a test particle in the vicinity of the horizon of a large Sch…
Simulation of an ensemble of twisted mass clover-improved fermions at physical quark masses
Jacob Finkenrath, Constantia Alexandrou, Simone Bacchio +7
We present a general strategy aimed at generating configurations with quarks at their physical mass using maximally twisted mass fermions to ensure automatic imp…