Kramers–Wannier duality
= Kramers–Wannier duality
{wiki=Kramers–Wannier_duality}
Kramers–Wannier duality is a concept from statistical mechanics and condensed matter physics that describes a relationship between two statistical systems, particularly in the context of lattice models. It was originally discovered in the context of the two-dimensional Ising model, but it applies more broadly to other statistical systems as well.