Non-Abelian Supertubes

TL;DR

This paper constructs a five-dimensional supergravity solution describing two supertubes with non-Abelian monodromies, revealing new non-geometric duality structures and potential microstates of four-dimensional black holes.

Contribution

It introduces the first supersymmetric supergravity solution with non-Abelian supertube monodromies, linking non-geometric dualities to black hole microstates.

Findings

Solution exhibits AdS2×S2 asymptotics with zero angular momentum.

Monodromies correspond to non-geometric duality twists.

Solution models a black hole microstate with a finite horizon.

Abstract

A supertube is a supersymmetric configuration in string theory which occurs when a pair of branes spontaneously polarizes and generates a new dipole charge extended along a closed curve. The dipole charge of a codimension-2 supertube is characterized by the U-duality monodromy as one goes around the supertube. For multiple codimension-2 supertubes, their monodromies do not commute in general. In this paper, we construct a supersymmetric solution of five-dimensional supergravity that describes two supertubes with such non-Abelian monodromies, in a certain perturbative expansion. In supergravity, the monodromies are realized as the multi-valuedness of the scalar fields, while in higher dimensions they correspond to non-geometric duality twists of the internal space. The supertubes in our solution carry NS5 and 5$_2^2$ dipole charges and exhibit the same monodromy structure as the SU(2) Seiberg-Witten geometry. The perturbative solution has $\mathrm{AdS}_2\times S^2$ asymptotics and vanishing four-dimensional angular momentum. We argue that this solution represents a microstate of four-dimensional black holes with a finite horizon and that it provides a clue for the gravity realization of a pure-Higgs branch state in the dual quiver quantum mechanics.