A substrate for brane shells from
arXiv:2012.09802 · doi:10.1007/JHEP05(2021)248
Abstract
A solvable current-current deformation of the worldsheet theory of strings on has been recently conjectured to be dual to an irrelevant deformation of the spacetime orbifold CFT, commonly referred to as single-trace . These deformations give rise to a family of bulk geometries which realize a non-trivial flow towards the UV. For a particular sign of this deformation, the corresponding three-dimensional geometry approaches in the interior, but has a curvature singularity at finite radius, beyond which there are closed timelike curves. It has been suggested that this singularity is due to the presence of "negative branes," which are exotic objects that generically change the metric signature. We propose an alternative UV-completion for these geometries by cutting and gluing to a regular background which approaches a linear dilaton vacuum in the UV. In the S-dual picture, a singularity resolution mechanism known as the enhançon induces this transition by the formation of a shell of -branes at a fixed radial position near the singularity. The solutions involving negative branes gain a new interpretation in this context.
arXiv comment38 pages, 1 figure. Added references
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