Black holes in higher spin supergravity

TL;DR

This paper investigates black hole solutions in higher spin supergravity with N=2 supersymmetry, establishing a correspondence with boundary CFT charges and symmetries, and confirming the duality through exact partition function matching.

Contribution

It provides a detailed analysis of black holes in sl(3|2) supergravity, identifying bulk-boundary charge relations, and demonstrating the agreement of partition functions in the bulk and boundary theories.

Findings

Black hole solutions include U(1) gauge and spin 2 hair.

Bulk charges match boundary CFT charges via Ward identities.

Partition functions in bulk and boundary theories are in exact agreement.

Abstract

We study black hole solutions in Chern-Simons higher spin supergravity based on the superalgebra sl(3|2). These black hole solutions have a U(1) gauge field and a spin 2 hair in addition to the spin 3 hair. These additional fields correspond to the R-symmetry charges of the supergroup sl(3|2). Using the relation between the bulk field equations and the Ward identities of a CFT with N=2 super-W_3 symmetry, we identify the bulk charges and chemical potentials with those of the boundary CFT. From these identifications we see that a suitable set of variables to study this black hole is in terms of the charges present in three decoupled bosonic sub-algebras of the N=2 super-W_3 algebra. The entropy and the partition function of these R-charged black holes are then evaluated in terms of the charges of the bulk theory as well as in terms of its chemical potentials. We then compute the partition function in the dual CFT and find exact agreement with the bulk partition function.