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February 8, 2026Communications in Mathematical Physics0 citations

Line Operators in U(1|1) Chern–Simons Theory

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NGNiklas GarnerWNWenjun Niu

Key Points

  • This research explores the structure of line operators in Chern–Simons theories based on the Lie superalgebra gl(1|1).
  • Analyzed the non-semisimple category of line operators
  • Identified the category of line operators with the derived category of modules for a boundary vertex operator algebra
  • Compared results with the cyclic orbifold of a free, B-twisted hypermultiplet
  • Established a connection between the category of line operators and the restricted quantum group
  • Identified discrepancies in the braiding and associator from expected physical dualities

Abstract

We analyze the non-semisimple category of line operators in Chern–Simons gauge theories based off the Lie superalgebra \ (gl (1|1) \). Our proposal is that the category of line operators \ (C\) can be identified with the derived category of modules for a boundary vertex operator algebra \ (V\) realized as a certain infinite-order simple current extension of the affine current algebra \ (V (gl (1|1) ) \) by boundary monopole operators. By translating this simple current extension of \ (V (gl (1|1) ) \) to the unrolled, restricted quantum group \ (UE (gl (1|1) ) \), we show that our category of line operators admits a second description in terms of a quasi-quantum group \ (A\) realized by uprolling. We also compare our results across an expected physical duality with the cyclic orbifold of a free, B -twisted hypermultiplet and find a slight discrepancy at the level of braiding and associator. We end with a detailed analysis of coupling to background flat \ (GL (1, {C}) \) connections and the resulting category of non-genuine line operators.

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Cite This Study

Garner et al. (2026) studied this question.

synapsesocial.com/papers/6987eb5df6bacdd2fe8fc8e7https://doi.org/10.1007/s00220-025-05546-5
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