Preprint
Aug 2026
Critical couplings of two dimensional Ising model on various lattices
We develop a unified fermionic-field formulation of the two-dimensional Ising model on several planar lattices using the Kac-Ward representation. Grassmann fields are associated with directed lattice links, while changes in the direction of fermionic trajectories are encoded by the corresponding Kac-Ward phase factors....
S. Khachatryan, A. Sedrakyan
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