PIRSA:25010082

The gravitational index of 5d black holes and black strings

(2025). The gravitational index of 5d black holes and black strings. Perimeter Institute. https://pirsa.org/25010082

The gravitational index of 5d black holes and black strings. Perimeter Institute, Jan. 28, 2025, https://pirsa.org/25010082 

          @misc{ pirsa_PIRSA:25010082,
            doi = {10.48660/25010082},
            url = {https://pirsa.org/25010082},
            author = {},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {The gravitational index of 5d black holes and black strings},
            publisher = {Perimeter Institute},
            year = {2025},
            month = {jan},
            note = {PIRSA:25010082 see, \url{https://pirsa.org}}
          }
Luca Iliesiu
Talk number
PIRSA:25010082
Collection
Talk Type
Subject
Abstract

In this talk, I will discuss how one can use the gravitational path integral to compute the supersymmetric index of black holes as well as other black objects in string theory. The saddles that I shall describe admit a non-zero temperature, consequently lacking an infinitely long AdS throat that separates the horizon from the asymptotic region, and also admit periodic boundary conditions for fermionic fields around the thermal circle, consequently counting bosonic and fermionic states with an opposite sign. Since the microscopic calculation of these indices is oftentimes well understood yet the saddles that I shall describe now lack the conventional decoupling limit taken in AdS/CFT, our analysis represents a first step towards understanding holography for supersymmetric observables in flat space.