Emergent IR dual 2d CFTs in chargedAdS5black holes

Abstract

We study the possible dynamical emergence of IR conformal invariance describing the low energy excitations of near-extremal $R$-charged global ${\mathrm{AdS}}_{5}$ 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 ${\mathrm{AdS}}_{3}$ 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.