Solitons in Five Dimensional Minimal Supergravity: Local Charge, Exotic Ergoregions, and Violations of the BPS Bound

TL;DR

This paper explores five-dimensional supergravity solitons with unique features like local charge and exotic ergoregions, revealing violations of the BPS bound and raising questions for AdS/CFT correspondence.

Contribution

It introduces a class of smooth solitons with local magnetic charge and unusual ergosurfaces, some exceeding the BPS bound, in five-dimensional supergravity.

Findings

Solitions are globally asymptotically flat or AdS without Kaluza-Klein directions.

Many solitons violate the BPS bound with more electric charge or angular momentum.

Presence of exotic ergoregions and minimal spheres in the interior.

Abstract

We describe a number of striking features of a class of smooth solitons in gauged and ungauged minimal supergravity in five dimensions. The solitons are globally asymptotically flat or asymptotically AdS without any Kaluza-Klein directions but contain a minimal sphere formed when a cycle pinches off in the interior of the spacetime. The solutions carry a local magnetic charge and many have rather unusual ergosurfaces. Perhaps most strikingly, many of the solitons have more electric charge or, in the asymptotically AdS case, more electric charge and angular momentum than is allowed by the usual BPS bound. We comment on, but do not resolve, the new puzzle this raises for AdS/CFT.