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A 1/4-BPS chiral algebra in D1D5: from charge concentration to BPS chaos

Year: 2026
Type: preprint
Abstract: The D1D5 CFT exhibits a charge concentration puzzle for BPS states, similar to, but simpler than, that of $\mathcal{N}=4$ SYM. We consider the chiral algebra of 1/4-BPS operators in the D1D5 CFT arising from a supercharge cohomology, and the resulting rational correlators. Using crossing symmetry and this chiral algebra, we establish a non-perturbative proof of the existence of a family of 1/4-BPS states away from the charge concentration locus for general coupling and finite central charge. We further discuss possible implications for BPS chaos in the D1D5 CFT and compute a late-time BPS plateau at the orbifold point.
DOI: 10.48550/arxiv.2609.00131
Institutions: Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca, University of Milano-Bicocca, University of California, Los Angeles, European Organization for Nuclear Research, Istituto Nazionale di Fisica Nucleare, Sezione di Padova, California Institute of Technology
Language: English
Open Access status: green
OpenAlex ID: W7206213980
Cites: 50
Cited by: 4
Related to: 10