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The Great Impersonation: -Solitons as Prototypical Black Hole Microstates
Alexandru Dima, Pierre Heidmann, Marco Melis +2
We analyze a new class of static, smooth geometries in five-dimensional supergravity, dubbed -solitons. They carry the same mass and charges as four-dimensional Reissn…
Fermionic Love of Black Holes in General Relativity
Sumanta Chakraborty, Pierre Heidmann, Paolo Pani
Black holes in General Relativity exhibit a remarkable feature: their response to static scalar, electromagnetic, and gravitational perturbations -- as quantified by the so-called…
Black hole mimickers: from theory to observation
Cosimo Bambi, Ramy Brustein, Vitor Cardoso +16
The black hole paradigm, while remarkably successful, raises fundamental questions-both classical and quantum-about the nature of spacetime, horizons, and singularities. Black hole…
Cavity effect in the quasinormal mode spectrum of topological stars
Pierre Heidmann, Nicholas Speeney, Emanuele Berti +1
We study scalar perturbations of topological solitons, smooth horizonless solutions in five-dimensional Einstein-Maxwell theory that correspond to coherent states of gravity via th…
Imaging Topological Solitons: the Microstructure Behind the Shadow
Pierre Heidmann, Ibrahima Bah, Emanuele Berti
We study photon geodesics in topological solitons that have the same asymptotic properties as Schwarzschild black holes. These are coherent states in string theory corresponding to…
Semi-classical analysis of black holes in Loop Quantum Gravity: Modelling Hawking radiation with volume fluctuations
Pierre Heidmann, Hongguang Liu, Karim Noui
We introduce the notion of fluid approximation of a quantum spherical black hole in the context of Loop Quantum Gravity. In this limit, the microstates of the black hole are intert…