Supergravity Supertubes
Roberto Emparan, David Mateos, Paul Townsend
TL;DR
This paper derives the supergravity solution for supertubes, revealing their key features, stability bounds, and implications for closed timelike curves and potential instabilities in string theory configurations.
Contribution
It provides the first explicit supergravity solution for supertubes, elucidating their physical properties and stability constraints within type IIA supergravity.
Findings
Supergravity solution captures supertube features
Identifies an angular momentum bound for stability
Links bound violation to closed timelike curves
Abstract
We find the supergravity solution sourced by a supertube: a (1/4)-supersymmetric D0-charged IIA superstring that has been blown up to a cylindrical D2-brane by angular momentum. The supergravity solution captures all essential features of the supertube, including the D2-dipole moment and an upper bound on the angular momentum: violation of this bound implies the existence of closed timelike curves, with a consequent ghost-induced instability of supertube probes.
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