4.6 Article

Non-abelian anyons and some cousins of the Arad-Herzog conjecture

Journal

Publisher

IOP Publishing Ltd
DOI: 10.1088/1751-8121/ac3623

Keywords

anyons; topological quantum field theory; Arad-Herzog conjecture; discrete gauge theory

Funding

  1. Royal Society
  2. STFC

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Arad and Herzog conjectured that in finite simple groups, the product of two conjugacy classes of length greater than one is never a single conjugacy class. This has implications for non-abelian anyons in 2D discrete gauge theories, revealing a close relationship between finite simple groups and their associated discrete gauge theories. The lack of certain dualities in theories with non-abelian finite simple gauge groups serves as a non-trivial test of the AH conjecture.
Long ago, Arad and Herzog (AH) conjectured that, in finite simple groups, the product of two conjugacy classes of length greater than one is never a single conjugacy class. We discuss implications of this conjecture for non-abelian anyons in 2 + 1-dimensional discrete gauge theories. Thinking in this way also suggests closely related statements about finite simple groups and their associated discrete gauge theories. We prove these statements and provide some physical intuition for their validity. Finally, we explain that the lack of certain dualities in theories with non-abelian finite simple gauge groups provides a non-trivial check of the AH conjecture.

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