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arXiv · 2609.00131

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

Alexandre Belin·Suzanne Bintanja·Alessandra Gnecchi·Damian R. Musk·Kyriakos Papadodimas
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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.

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Alexandre Belin, Suzanne Bintanja, Alessandra Gnecchi, Damian R. Musk, Kyriakos Papadodimas. 2026-08-31. A 1/4-BPS chiral algebra in D1D5: from charge concentration to BPS chaos. https://arxiv.org/abs/2609.00131

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