Pierre Heidmann
YOU?
Author Swipe
Localized black holes in AdS3: what happens below $$ \frac{c}{12} $$ stays below $$ \frac{c}{12} $$ Open
A bstract We construct asymptotically AdS 3 ×S 3 ×T 4 black holes that are localized on the S 3 and co-exist with the BTZ black hole at small positive energies. These black holes dominate the microcanonical ensemble for E ≤ $$ \frac{c}{24}…
Asymptotically Flat Rotating Topological Stars Open
We construct a new class of smooth, horizonless, non-supersymmetric solutions in five-dimensional minimal supergravity, which we call rotating topological stars. Built from a Kerr-Taub-bolt geometry embedded in five dimensions, they consti…
Tidal disruption in topological solitons and the emergence of an effective horizon Open
We compute the dynamics of particles and strings falling into smooth horizonless spacetimes that match the Schwarzschild black hole but replace its horizon with a smooth cap in supergravity. The cap consists of a regular topological struct…
The Great Impersonation: $\mathcal{W}$-Solitons as Prototypical Black Hole Microstates Open
We analyze a new class of static, smooth geometries in five-dimensional supergravity, dubbed $\mathcal{W}$-solitons. They carry the same mass and charges as four-dimensional Reissner-Nordström-like black holes but replace the horizon with …
Fermionic Love of Black Holes in General Relativity Open
Black holes in General Relativity exhibit a remarkable feature: their response to static scalar, electromagnetic, and gravitational perturbations -- as quantified by the so-called tidal Love numbers -- vanishes identically. We present the …
Microstates of non-extremal black holes: a new hope Open
A bstract We provide a new roadmap for constructing microstates of non-extremal black holes in supergravity. First, we review the non-linear sigma model of five-dimensional supergravity governing stationary solutions with a U(1) isometry a…
Tidal Disruption in Topological Solitons and the Emergence of an Effective Horizon Open
We compute the dynamics of particles and strings falling into smooth horizonless spacetimes that match the Schwarzschild black hole but replace its horizon with a smooth cap in supergravity. The cap consists of a regular topological struct…
View article: Black hole mimickers: from theory to observation
Black hole mimickers: from theory to observation Open
The black hole paradigm, while remarkably successful, raises fundamental questions-both classical and quantum-about the nature of spacetime, horizons, and singularities. Black hole mimickers, horizonless ultra-compact objects, have emerged…
Localized Black Holes in AdS$_3$: What Happens Below c/12 Stays Below c/12 Open
We construct asymptotically AdS$_3 \times$S$^3 \times$T$^4$ black holes that are localized on the S$^3$ and co-exist with the BTZ black hole at small positive energies. These black holes dominate the microcanonical ensemble for $ E\leq \fr…
Building the blocks of Schwarzschild Open
A bstract We demonstrate that the Schwarzschild black hole can be “resolved” into bound states of Reissner-Nordström black holes in four dimensions. These bound states closely resemble the Schwarzschild geometry from the asymptotic region …
Half the Schwarzschild entropy from Strominger-Vafa black holes Open
We construct a regular bound state of two extremal black holes in type IIB supergravity with opposite charges. The bound state resembles the Schwarzschild black hole from the asymptotics to the photon ring and has the same mass and charges…
Building the Blocks of Schwarzschild Open
We demonstrate that the Schwarzschild black hole can be ``resolved'' into bound states of Reissner-Nordstr\"om black holes in four dimensions. These bound states closely resemble the Schwarzschild geometry from the asymptotic region up to …
Geometric resolution of the Schwarzschild horizon Open
We provide the first example of a geometric transition that resolves the Schwarzschild black hole into a smooth microstructure in eleven-dimensional supergravity on a seven-torus. The geometry is indistinguishable from a Schwarzschild blac…
Electromagnetic entrapment in gravity Open
A bstract We derive specific properties of electromagnetism when gravitational effects are not negligible and analyze their impact on new physics at the horizons of black holes. We show that a neutral configuration of charges in a region o…
Half the Schwarzschild Entropy from Strominger-Vafa Black Holes Open
We construct a regular bound state of two extremal black holes in type IIB supergravity with opposite charges. The bound state resembles the Schwarzschild black hole from the asymptotics to the photon ring and has the same mass and charges…
Electromagnetic Entrapment in Gravity Open
We derive specific properties of electromagnetism when gravitational effects are not negligible and analyze their impact on new physics at the horizons of black holes. We show that a neutral configuration of charges in a region of high red…
Solitonic excitations in AdS2 Open
A bstract We construct large families of supergravity solutions that are asymptotic to AdS 2 and terminate with a cap that is singular in two dimensions but smooth in higher dimensions. These solutions break supersymmetry and conformal inv…
Cavity effect in the quasinormal mode spectrum of topological stars Open
We study scalar perturbations of topological solitons, smooth horizonless solutions in five-dimensional Einstein-Maxwell theory that correspond to coherent states of gravity via the dynamics of extra compact dimensions. First, we compute s…
Geometric Resolution of Schwarzschild Horizon Open
We provide the first example of a geometric transition that resolves the Schwarzschild black hole into a smooth microstructure in eleven-dimensional supergravity on a seven-torus. The geometry is indistinguishable from a Schwarzschild blac…
Imaging Topological Solitons: the Microstructure Behind the Shadow Open
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 pure deformations of spacetime through the dynamics of com…
Solitonic Excitations in AdS2 Open
We construct large families of supergravity solutions that are asymptotic to AdS$_2$ and terminate with a cap that is singular in two dimensions but smooth in higher dimensions. These solutions break supersymmetry and conformal invariance.…
The Uplifton Open
Almost all proposals to construct de Sitter vacua with a small cosmological constant involve flux compactifications with stabilized moduli. These give AdS vacua, which are uplifted to de Sitter by adding antibranes in certain regions of th…
Non-BPS Bubbling Geometries in AdS$_3$ Open
We construct large classes of non-BPS smooth horizonless geometries that are asymptotic to AdS$_3\times$S$^3\times$T$^4$ in type IIB supergravity. These geometries are supported by electromagnetic flux corresponding to D1-D5 charges. We sh…
Stability of topological solitons, and black string to bubble transition Open
We study the existence of smooth topological solitons and black strings as locally-stable saddles of the Euclidean gravitational action of five dimensional Einstein-Maxwell theory. These objects live in the Kaluza-Klein background of four …
Non-BPS Floating Branes and Bubbling Geometries Open
We derive a non-BPS linear ansatz using the charged Weyl formalism in string and M-theory backgrounds. Generic solutions are static and axially-symmetric with an arbitrary number of non-BPS sources corresponding to various brane, momentum …
Bubble bag end: a bubbly resolution of curvature singularity Open
A bstract We construct a family of smooth charged bubbling solitons in $$ \mathbbm{M} $$ 4 ×T 2 , four-dimensional Minkowski with a two-torus. The solitons are characterized by a degeneration pattern of the torus along a line in $$ \mathbb…