Parton sectors on gapped domain walls are identified with indecomposable bimodule subcategories of relative tensor products, giving a categorical theory with a proven dimension formula.
For M ̸= N, there may not be a vacuum state (or even an Abelian state)
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An Algebraic Theory of Gapped Domain Wall Partons
Parton sectors on gapped domain walls are identified with indecomposable bimodule subcategories of relative tensor products, giving a categorical theory with a proven dimension formula.