In this talk, I will introduce a new approach for studying $d+1$ dimensional Euclidean Schwarzschild black holes with Hawking temperature near the Hagedorn temperature, as well as the Horowitz-Polchinski (HP) solutions. The worldsheet theory that describes some of these backgrounds is strongly coupled. We use its underlying affine $SU(2)_L\times SU(2)_R$ symmetry to continue to weak coupling, by varying the level of the current algebra from the small value relevant for black holes and HP solutions to a large value. In this limit, the dynamics can be captured by a solvable effective field theory, closely related to previous work on the non-abelian Thirring model. I will also discuss several interesting properties of the resulting solutions that have implications for the black hole/fundamental string transition.

Biography

Jinwei Chu received his Bachelor’s degree in 2020 from Fudan University under the supervision of Prof. Yang Zhou. He is currently completing his PhD at the University of Chicago under the supervision of Prof. David Kutasov. His research interests include black holes in string theory, string cosmology, entanglement entropy and scattering amplitudes.

Inviter: Jie-Qiang Wu