A bstract We construct a family of smooth charged bubbling solitons in $$ \mathbbm{M} $$ M 4 ×T 2 , fourdimensional Minkowski with a twotorus. The solitons are characterized by a degeneration pattern of the torus along a line in $$ \mathbbm{M} $$ M 4 defining a chain of topological cycles. They live in the same parameter regime as nonBPS nonextremal fourdimensional black holes, and are ultracompact with sizes ranging from miscroscopic to macroscopic scales. The sixdimensional framework can be embedded in type IIB supergravity where the solitons are identified with geometric transitions of nonBPS D1D5KKm bound states. Interestingly, the geometries admit a minimal surface that smoothly opens up to a bubbly end of space. Away from the solitons, the solutions are indistinguishable from a new class of singular geometries. By taking a limit of large number of bubbles, the soliton geometries can be matched arbitrarily close to the singular spacetimes. This provides the first classical resolution of a curvature singularity beyond the framework of supersymmetry and supergravity by blowing up topological cycles wrapped by fluxes at the vicinity of the singularity.
This content will become publicly available on February 1, 2023
NonBPS floating branes and bubbling geometries
A bstract We derive a nonBPS linear ansatz using the charged Weyl formalism in string and Mtheory backgrounds. Generic solutions are static and axiallysymmetric with an arbitrary number of nonBPS sources corresponding to various brane, momentum and KKm charges. Regular sources are either fourcharge nonextremal black holes or smooth nonBPS bubbles. We construct several families such as chains of nonextremal black holes or smooth nonBPS bubbling geometries and study their physics. The smooth horizonless geometries can have the same mass and charges as nonextremal black holes. Furthermore, we find examples that scale towards the fourcharge BPS black hole when the nonBPS parameters are taken to be small, but the horizon is smoothly resolved by adding a small amount of nonextremality.
 Award ID(s):
 2112699
 Publication Date:
 NSFPAR ID:
 10332869
 Journal Name:
 Journal of High Energy Physics
 Volume:
 2022
 Issue:
 2
 ISSN:
 10298479
 Sponsoring Org:
 National Science Foundation
More Like this


A bstract We construct the first smooth bubbling geometries using the Weyl formalism. The solutions are obtained from Einstein theory coupled to a twoform gauge field in six dimensions with two compact directions. We classify the charged Weyl solutions in this framework. Smooth solutions consist of a chain of KaluzaKlein bubbles that can be neutral or wrapped by electromagnetic fluxes, and are free of curvature and conical singularities. We discuss how such topological structures are prevented from gravitational collapse without struts. When embedded in type IIB, the class of solutions describes D1D5KKm solutions in the nonBPS regime, and the smooth bubbling solutions have the same conserved charges as a static fourdimensional nonextremal CveticYoum black hole.

A bstract We construct a family of nonsupersymmetric extremal black holes and their horizonless microstate geometries in four dimensions. The black holes can have finite angular momentum and an arbitrary chargetomass ratio, unlike their supersymmetric cousins. These features make them and their microstate geometries astrophysically relevant. Thus, they provide interesting prototypes to study deviations from Kerr solutions caused by new horizonscale physics. In this paper, we compute the gravitational multipole structure of these solutions and compare them to Kerr black holes. The multipoles of the black hole differ significantly from Kerr as they depend nontrivially on the chargetomass ratio. The horizonless microstate geometries (that are comparable in size to a black hole) have a similar multipole structure as their corresponding black hole, with deviations to the black hole multipole values set by the scale of their microstructure.

Abstract Due to the failure of thermodynamics for low temperature nearextremal black holes, it has long been conjectured that a ‘thermodynamic mass gap’ exists between an extremal black hole and the lightest nearextremal state. For nonsupersymmetric nearextremal black holes in Einstein gravity with an AdS 2 throat, no such gap was found. Rather, at that energy scale, the spectrum exhibits a continuum of states, up to nonperturbative corrections. In this paper, we compute the partition function of nearBPS black holes in supergravity where the emergent, broken, symmetry is PSU (1, 12). To reliably compute this partition function, we show that the gravitational path integral can be reduced to that of a N = 4 supersymmetric extension of the Schwarzian theory, which we define and exactly quantize. In contrast to the nonsupersymmetric case, we find that black holes in supergravity have a mass gap and a large extremal black hole degeneracy consistent with the Bekenstein–Hawking area. Our results verify a plethora of string theory conjectures, concerning the scale of the mass gap and the counting of extremal microstates.

A bstract We construct smooth static bubble solutions, denoted as topological stars, in fivedimensional EinsteinMaxwell theories which are asymptotic to ℝ 1 , 3 ×S 1 . The bubbles are supported by allowing electromagnetic fluxes to wrap smooth topological cycles. The solutions live in the same regime as nonextremal static charged black strings, that reduce to black holes in four dimensions. We generalize to multibody configurations on a line by constructing closedform generalized charged Weyl solutions in the same theory. Generic solutions consist of topological stars and black strings stacked on a line, that are wrapped by electromagnetic fluxes. We embed the solutions in type IIB String Theory on S 1 ×T 4 . In this framework, the charged Weyl solutions provide a novel class in String Theory of multiple charged objects in the nonsupersymmetric and nonextremal black hole regime.