Third-neighbor and other four-point correlation functions of spin-1/2 XXZ chain
arXiv:cond-mat/0402625 · doi:10.1088/0305-4470/37/19/001
Abstract
The correlation functions of the spin-1/2 XXZ chain in the ground state were expressed in the form of multiple integrals for -1<Î\leq 1 and 1<Î. In particular, adjacent four-point correlation functions were given as certain four-dimensional integrals. We show that these integrals can be reduced to polynomials with respect to specific one-dimensional integrals. The results give the polynomial representation of the third-neighbor correlation functions.
34 pages