The Entropy for General Extremal Black Holes

Understand

We use the Kerr/CFT correspondence to calculate the entropy for all known extremal stationary and axisymmetric black holes.

• This is done with the help of two ansatzs that are general enough to cover all such known solutions.
• Considering only the contribution from the Einstein-Hilbert action to the central charge(s), we find that the entropy obtained by using Cardy's formula exactly matches with the Bekenstein-Hawking entropy.