Integrable Magnetic Model of Two Chains Coupled by Four-Body Interactions
arXiv:cond-mat/9902007 · doi:10.1143/JPSJ.68.2098
Abstract
An exact solution for an XXZ chain with four-body interactions is obtained and its phase diagram is determined. The model can be reduced to two chains coupled by four-body interactions, and it is shown that the ground state of the two-chain model is magnetized in part. Furthermore, a twisted four-body correlation function of the anti-ferromagnetic Heisenberg chain is obtained.
7 pages, LaTeX, to be published in J. Phys. Soc. Jpn., rederived the model