The converse to E1-Morita invariance of module categories

Let \CC\CC be a cocomplete EmE_m-monoidal category, and let A1,A2A_1,A_2 be E1E_1-algebras in \CC\CC. Write \ModAE1(\CC)\Mod_A^{E_1}(\CC) for the E1E_1-module category of AA.

The converse Morita conjecture. If

\ModA1E1(\CC)\ModA2E1(\CC)\Mod_{A_1}^{E_1}(\CC)\simeq\Mod_{A_2}^{E_1}(\CC)

as E1E_1-monoidal categories, then A1A_1 and A2A_2 are E1E_1-Morita equivalent.

This would make the E1E_1-monoidal module category a complete invariant for E1E_1-Morita equivalence, but the source offers no proof or resolution.

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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