Chi-Ming Chang

activity

20232026

most citedOn

\frac{1}{8}

-BPS black holes and the chiral algebra of

N = 4

SYM

9 citations · 13 across the 7 of their papers we have counts for

collaborators

Showing 2025Show all

3 papers · 1 filter

hep-th2025

Fortuity and R-charge concentration in the D1-D5 CFT

Chi-Ming Chang, Haoyu Zhang

We investigate finite- $N$ BPS cohomology in the D1--D5 CFT, focusing on the sector of fortuitous classes. Analyzing the supercharge cochain complexes in the $N = 2$ and $N = 3$ theorie…

hep-th2025

Violation of S-duality in classical $Q$ -cohomology

Chi-Ming Chang, Ying-Hsuan Lin

We study the cohomology of a chiral supercharge $Q$ in the $N = 4$ super-Yang-Mills (SYM) theory at tree level. The cohomology classes correspond one-to-one to the $\frac1{…

hep-th2025

Fortuity in the D1-D5 system

Chi-Ming Chang, Ying-Hsuan Lin, Haoyu Zhang

We reformulate the lifting problem in the D1-D5 CFT as a supercharge cohomology problem, and enumerate BPS states according to the fortuitous/monotone classification. Working in th…

Fortuity and R-charge concentration in the D1-D5 CFT

Violation of S-duality in classical Q-cohomology

Fortuity in the D1-D5 system

Violation of S-duality in classical $Q$ -cohomology