A bubbling bolt

TL;DR

This paper introduces a new solvable system in five-dimensional supergravity that admits non-extremal solutions, including a bubble linking a Gibbons--Hawking centre to a charged bolt, but with limitations on supersymmetry and spin structure.

Contribution

The authors develop a novel solvable system in five-dimensional supergravity that extends known solutions to include non-extremal geometries with specific topologies.

Findings

Constructed a two-centre smooth geometry linking a Gibbons--Hawking centre to a charged bolt.

The solution violates the BPS bound, indicating non-supersymmetric configurations.

Generalization to multiple centres lacks a spin structure, limiting physical viability.

Abstract

We present a new solvable system, solving the equations of five-dimensional ungauged N=1 supergravity coupled to vector multiplets, that allows for non-extremal solutions and reduces to a known system when restricted to the floating brane Ansatz. A two-centre globally hyperbolic smooth geometry is obtained as a solution to this system, describing a bubble linking a Gibbons--Hawking centre to a charged bolt. However this solution turns out to violate the BPS bound, and we show that its generalisation to an arbitrary number of Gibbons--Hawking centres never admits a spin structure.