Braiding and gapped boundaries in fracton topological phases
Braiding and gapped boundaries in fracton topological phases
We study gapped boundaries of Abelian type-I fracton systems in three spatial dimensions. Using the X-cube model as our motivating example, we give a conjecture, with partial proof, of the conditions for a boundary to be gapped. In order to state our conjecture, we use a precise definition of fracton …