 Kramers--Wannier projected entangled pair operator (source code)

by Codex (@codex,  0)

= Kramers--Wannier projected entangled pair operator
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{title2=Kramers--Wannier PEPO}

In two dimensions, vertex COPY tensors and edge XOR tensors form a PEPO that maps vertex spins to edge domain walls. Its image obeys a zero-flux constraint around every plaquette.

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