Traces on the Sklyanin algebra and correlation functions of the eight-vertex model

Details Traces on the Sklyanin algebra and correlation functions of the eight-vertex model Traces on the Sklyanin algebra and correlation functions of the eight-vertex model

2005-04-08

arxiv.org/abs/hep-th/0504072v3

J.Phys. A38 (2005) 7629-7660

Physics

High Energy Physics

High Energy Physics - Theory

35 pages, 2 figures, final version

Scientific paper

10.1088/0305-4470/38/35/003

We propose a conjectural formula for correlation functions of the Z-invariant (inhomogeneous) eight-vertex model. We refer to this conjecture as Ansatz. It states that correlation functions are linear combinations of products of three transcendental functions, with theta functions and derivatives as coefficients. The transcendental functions are essentially logarithmic derivatives of the partition function per site. The coefficients are given in terms of a linear functional on the Sklyanin algebra, which interpolates the usual trace on finite dimensional representations. We establish the existence of the functional and discuss the connection to the geometry of the classical limit. We also conjecture that the Ansatz satisfies the reduced qKZ equation. As a non-trivial example of the Ansatz, we present a new formula for the next-nearest neighbor correlation functions.

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