Figure 6: Two equivalent descriptions of the boundary of 2D SPT model with symmetry. | Nature Communications

Figure 6: Two equivalent descriptions of the boundary of 2D SPT model with symmetry.

From: Symmetry-protected topological phases from decorated domain walls

Figure 6

(a) thick bonds represent Z2 variable in state and thin bonds , spin 1/2 exists on their domain wall. (b) One Z2 variable per bond and one spin variable per vertex. Time reversal acts on spins in a way dependent of neighboring Z2 configurations. Dotted boxes represent local degrees of freedom on the 1D boundary labelled by group elements.

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