Emergent IR dual 2d CFTs in charged AdS5 black holes

TL;DR

This paper investigates how IR conformal invariance emerges in near-extremal R-charged AdS5 black holes, revealing different dual 2D CFT descriptions in BPS and non-BPS regimes, with implications for gauge/gravity duality.

Contribution

It identifies emergent IR 2D CFTs in charged AdS5 black holes and analyzes their differences in BPS and non-BPS cases, including a natural quantization of the central charge.

Findings

Emergent IR conformal invariance in near-extremal black holes.

Distinct local AdS3 throats in BPS and non-BPS regimes.

Quantized central charge related to open strings between giant gravitons.

Abstract

We study the possible dynamical emergence of IR conformal invariance describing the low energy excitations of near-extremal R-charged global AdS5 black holes. We find interesting behavior especially when we tune parameters in such a way that the relevant extremal black holes have classically vanishing horizon area, i.e. no classical ground-state entropy, and when we combine the low energy limit with a large N limit of the dual gauge theory. We consider both near-BPS and non-BPS regimes and their near horizon limits, emphasize the differences between the local AdS3 throats emerging in either case, and discuss potential dual IR 2d CFTs for each case. We compare our results with the predictions obtained from the Kerr/CFT correspondence, and obtain a natural quantization for the central charge of the near-BPS emergent IR CFT which we interpret in terms of the open strings stretched between giant gravitons.