Exciting AdS Orbifolds

TL;DR

This paper explores supersymmetric AdS orbifolds, revealing their role in AdS fragmentation, fivebrane emergence, and potential applications to black hole and cosmological models, linking string orbifolds with dual CFT descriptions.

Contribution

It demonstrates how specific AdS orbifolds describe AdS fragmentation and connects their string and CFT descriptions, offering insights into black hole and cosmological scenarios.

Findings

Orbifold moduli correspond to fivebrane collective coordinates.

Orbifolds describe AdS fragmentation and fivebrane emergence.

Potential applications to BTZ black holes and cosmology.

Abstract

The supersymmetric $(AdS_3\times S^3)/Z_N$ orbifold constructed by the authors in hep-th/0106171 is shown to describe AdS fragmentation, where fivebranes are emerging from the F1-NS5 background. The twisted sector moduli of the orbifold are the collective coordinates of groups of $n_5/N$ fivebranes. We discuss the relation between the descriptions of this background as a perturbative string orbifold and as a BPS state in the dual spacetime CFT. Finally, we attempt to apply the lessons learned to the description of BTZ black holes as $AdS_3$ orbifolds and to related big crunch/big bang cosmological scenarios.