CFT duals on extremal rotating NUT black hole

TL;DR

This paper explores the holographic duality of extremal rotating NUT black holes using Kerr/CFT correspondence, calculating their microscopic entropy and confirming it matches the Bekenstein-Hawking entropy through conformal field theory methods.

Contribution

It extends Kerr/CFT correspondence to extremal rotating NUT black holes, deriving their microscopic entropy and confirming the holographic duality with a conformal field theory.

Findings

Microscopic entropy matches Bekenstein-Hawking entropy.

Conformal temperatures and central charges are computed.

Logarithmic corrections to entropy are derived.

Abstract

We investigate the Kerr-Newman-NUT black hole solution obtained from Pleba\'nski-Demia\'nski solutions with several assumptions. The origin of the microscopic entropy of this black hole is investigated using the conjectured Kerr/CFT correspondence which is originally proposed for extremal Kerr black holes. The isometry of the near-horizon extremal Kerr-Newman-NUT black hole shows that the asymptotic symmetry group may be implemented to compute the central charge of the Virasoro algebra. Furthermore, by assuming Frolov-Thorne vacuum, the conformal temperatures can be obtained. Then by using the Cardy formula, the microscopic entropy is gained which matches the Bekenstein-Hawking entropy. We also employ Cardy prescription to find the logarithmic correction of the entropy. Then at limit $ a \rightarrow 0 $, the extremal Reissner-Nordstr\"om-NUT solution is recovered and by enhancing with the fibered coordinate we find the five-dimensional (5D) solution. The second dual CFT is applied to this black hole to gain the entropy. Finally, the microscopic entropy is still in agreement with the area law of 5D black hole solution. Hence, the extremal Reissner-Nordstr\"om-NUT solution is holographically dual to the CFT.