(Q5348943)

English

eight-vertex model

square lattice model whose state is a set of orientations for every edge such that at each vertex an even number of arrows point inward

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Z(\beta )=\sum \exp(-\beta (n_{1}\epsilon _{1}+n_{2}\epsilon _{2}+n_{3}\epsilon _{3}+n_{4}\epsilon _{4}+n_{5}\epsilon _{5}+n_{6}\epsilon _{6}+n_{7}\epsilon _{7}+n_{8}\epsilon _{8}))

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Eightvertex2.png
1,683 × 282; 28 KB

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