[NTU String Seminar] Fortuity and relevant deformation

• Event Date: 2026-02-26
• Chen, Jhan Yu 陳詹喻
• High Energy Physics and Astrophysics High energy theory
• Speaker: Seunggyu Kim (KAIST, Taejon)  /  Host: Prof. Pei-Ming Ho
  Place: Rm. 815, Dept. of Physics, NTU

Title: [NTU String Seminar] Fortuity and relevant deformation
Speaker: Seunggyu Kim (KAIST, Taejon) 
Time: 2026/2/26 (Thurs.) 14:30
Place: Rm. 815, Dept. of Physics, NTU
 

Abstract

We will discuss recent developments in the context of black hole microstates and their counting, focusing on Q-cohomology and the phenomenon of fortuity.  In particular, we explain how such states can be identified systematically, using as a concrete example an N=1 SCFT obtained by a mass deformation of N=4 SYM. We find that unlike N = 4 fortuitous cohomologies, they can either be non-vanishing or vanishing on the diagonal fields. 
We further show that the non-vanishing classes reduce to the monotone cohomologies of N = 4 SYM, whereas the vanishing classes reduce to the fortuitous cohomologies of N = 4 SYM. This suggests that fortuity can arise due to a relevant deformation, while monotonicity does not.