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Infrared Computations of Defect Schur Indices

2 Pith papers cite this work. Polarity classification is still indexing.

2 Pith papers citing it
abstract

We conjecture a formula for the Schur index of N=2 four-dimensional theories in the presence of boundary conditions and/or line defects, in terms of the low-energy effective Seiberg-Witten description of the system together with massive BPS excitations. We test our proposal in a variety of examples for SU(2) gauge theories, either conformal or asymptotically free. We use the conjecture to compute these defect-enriched Schur indices for theories which lack a Lagrangian description, such as Argyres-Douglas theories. We demonstrate in various examples that line defect indices can be expressed as sums of characters of the associated two-dimensional chiral algebra and that for Argyres-Douglas theories the line defect OPE reduces in the index to the Verlinde algebra.

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hep-th 2

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2026 2

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UNVERDICTED 2

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representative citing papers

On non-relativistic integrable models and 4d SCFTs

hep-th · 2026-04-21 · unverdicted · novelty 6.0

Generalized Schur indices of N=2 class S theories are expressed using eigenfunctions of non-relativistic elliptic Calogero-Moser models, with extensions claimed for N=1 SCFTs via limits of models like Inozemtsev.

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Showing 2 of 2 citing papers.

  • Half-BPS Boundaries and the RG-Wall of $\mathcal{N}=2$ $SU(N)$ SYM hep-th · 2026-06-29 · unverdicted · none · ref 13 · internal anchor

    A massive deformation of the T[SU(N)] theory is identified as the 3d SCFT realizing the RG-wall and half-BPS boundaries in 4d N=2 SU(N) SYM.

  • On non-relativistic integrable models and 4d SCFTs hep-th · 2026-04-21 · unverdicted · none · ref 153

    Generalized Schur indices of N=2 class S theories are expressed using eigenfunctions of non-relativistic elliptic Calogero-Moser models, with extensions claimed for N=1 SCFTs via limits of models like Inozemtsev.