Bubble Bag End: A Bubbly Resolution of Curvature Singularity

Abstract

We construct a family of smooth charged bubbling solitons in ${\mathbb{M}}^4\times$T${}^2$, four-dimensional Minkowski with a two-torus. The solitons are characterized by a degeneration pattern of the torus along a line in ${\mathbb{M}}^4$ defining a chain of topological cycles. They live in the same parameter regime as non-BPS non-extremal four-dimensional black holes, and are ultra-compact with sizes ranging from miscroscopic to macroscopic scales. The six-dimensional framework can be embedded in type IIB supergravity where the solitons are identified with geometric transitions of non-BPS D1-D5-KKm 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.

arXiv comment32 pages + appendix, 14 figures, v3: minor edits

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• AdS${}_3$ holography for non-BPS geometries
• Non-BPS Bubbling Geometries in AdS${}_3$
• Solitonic Excitations in AdS2
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