Essler, Fabian H. L.; Frahm, Holger; Its, Alexander R.; Korepin, Vladimir E. Integro-difference equation for a correlation function of the spin-\(\frac 12\) Heisenberg \(XXZ\) chain. (English) Zbl 1009.82506 Nucl. Phys., B 446, No. 3, 448-460 (1995). MSC: 82B23 81U40 PDFBibTeX XMLCite \textit{F. H. L. Essler} et al., Nucl. Phys., B 446, No. 3, 448--460 (1995; Zbl 1009.82506) Full Text: DOI arXiv
Frahm, Holger; Its, Alexander R.; Korepin, Vladimir E. Differential equation for a correlation function of the spin-\(\frac12\) Heisenberg chain. (English) Zbl 1049.82508 Nucl. Phys., B 428, No. 3, 694-710 (1994). MSC: 82B20 PDFBibTeX XMLCite \textit{H. Frahm} et al., Nucl. Phys., B 428, No. 3, 694--710 (1994; Zbl 1049.82508) Full Text: DOI arXiv