Quantum Black Hole Entropy from 4d Supersymmetric Cardy formula

Abstract

We study supersymmetric index of 4d $SU(N)$ $\mathcal{N}=4$ super Yang-Mills theory on $S^1\times M_3$. We compute asymptotic behavior of the index in the limit of shrinking $S^1$ for arbitrary $N$ by a refinement of supersymmetric Cardy formula. The asymptotic behavior for the superconformal index case ($M_3=S^3$) at large $N$ agrees with the Bekenstein-Hawking entropy of rotating electrically charged BPS black hole in $Ad{S}_5$ via a Legendre transformation as recently shown in literature. We also find that the agreement formally persists for finite $N$ if we slightly modify the AdS/CFT dictionary between Newton constant and $N$. This implies an existence of non-renormalization property of the quantum black hole entropy. We also study the cases with other gauge groups and additional matters, and the orbifold $\mathcal{N}=4$ super Yang-Mills theory. It turns out that the entropies of all the CFT examples in this paper are given by $2\pi \sqrt{Q_1{Q}_2+Q_1{Q}_3+Q_2{Q}_3-2c(J_1+J_2)}$ with charges $Q_{1,2,3}$, angular momenta $J_{1,2}$ and central charge $c$. The results for other $M_3$ make predictions to the gravity side.

14+5 pages, 2 figures; v3:references added, modifications of mentions to literature

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Cited by in corpus (5)

• The growth of the $\frac{1}{16}$-BPS index in 4d $\mathcal{N}=4$ SYM
• From multi-gravitons to Black holes: The role of complex saddles
• Black hole superpotential as a unifying entropy function and BPS thermodynamics
• Confinement and Graded Partition Functions for $\mathcal{N}=4$ SYM
• The Giant Graviton Expansion