Extension of 2-Morita equivalence to braided fusion categories

Let \CC\CC be a braided fusion category, and let A,BA,B be E2E_2-algebras in \CC\CC. Define two E2E_2-algebras to be E2E_2-Morita equivalent when their module categories are E1E_1-Morita equivalent.

Braided 2-Morita conjecture. This definition of E2E_2-Morita equivalence extends to braided fusion categories without requiring non-degeneracy.

For modular tensor categories, the source relates E2E_2-Morita equivalence to equivalence of local module categories. The proposed extension removes the modular non-degeneracy assumption, but no proof or resolution is supplied.

Sources & referencesView supporting material

Primary source

Rongge Xu and Holiverse Yang, “2-Morita Equivalent Condensable Algebras and Domain Walls in 2+1D Topological Orders”, arXiv:2403.19779 (2025).

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