2024/02/20 by Seunggyu Kim, Kim, Seunggyu, Eunwoo Lee +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Relativity and Gravitational Theory
paper · pdf · doi:10.48550/arxiv.2402.12924
openalex publication_date 2024/02/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
It has been proposed that the superconformal index admits a novel reformulation, called giant graviton expansion. In this paper, we investigate the properties of dual AdS5 black holes using the giant graviton expansion framework. First, we compute the entropy of black holes in AdS5× S5 with fixed charges through a large N saddle point analysis on the giant graviton index and further extremize it in the wrapping number. We identify a specific regime of fugacities where our saddle point analysis is valid. It turns out that this condition ensures the absence of closed-time-like curves and the stability of dual black hole solutions with equal charges. In addition, the giant graviton expansion of the index provides insights into how small black holes in AdS can be interpreted as bound states of branes. We extend our study to include the giant graviton expansion with the insertion of a half-BPS surface defect in N=4 SYM with a U(N) gauge group. Finally, we test the giant graviton expansion in various holographic theories whose dual geometries are AdS5× S5/ℤk and AdS5× SE5.