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Physics Letters A

Electric correlation function for the eight-vertex model for T→T−c to first order in the four-spin coupling

Lee-Fen Ko, Barry M. McCoy

Published Oct 1, 1986• 4 citations
Publisher
DOI
10.1016/0375-9601(86)90361-0

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We calculate the two-particle contribution to the spectral weight function of the electric correlation functions of the eight-vertex model in the scaling limit to first order in the four-spin coupling. Both T<TcT<{T}_{c}T<Tc​ and T>TcT>{T}_{c}T>Tc​ are considered. In both cases the result is remarkably simple. For T>TcT>{T}_{c}T>Tc​, the effect of the emergence of the bound state from the two-particle continuum is seen. The corresponding results for the Ashkin-Teller model and the XYZ\mathrm{XYZ}XYZ spin chain are also given.