Bubbling 1/2 BPS solutions of minimal six-dimensional supergravity

TL;DR

This paper extends the analysis of 1/2 BPS bubbling solutions in minimal six-dimensional supergravity by incorporating an axion field, relaxing previous constraints, and demonstrating a consistent four-dimensional reduction.

Contribution

It introduces an axion field in the reduction process, relaxing the F∧F constraint, and constructs a family of 1/2 BPS bubbling solutions in six-dimensional supergravity.

Findings

Relaxation of F∧F constraint via axion activation.

Consistent 4D bosonic field theory reduction.

Construction of new 1/2 BPS bubbling solutions.

Abstract

We continue our previous analysis (hep-th/0412045) of 1/2 BPS solutions to minimal 6d supergravity of bubbling form. We show that, by turning on an axion field in the T^2 torus reduction, the constraint F \wedge F, present in the case of an S^1 x S^1 reduction, is relaxed. We prove that the four-dimensional reduction to a bosonic field theory, whose content is the metric, a gauge field, two scalars and a pseudo-scalar (the axion), is consistent. Moreover, these reductions when lifted to the six-dimensional minimal supergravity represent the sought-after family of 1/2 BPS bubbling solutions.