On the spectrum of S=1/2 XXX Heisenberg chain with elliptic exchange
arXiv:cond-mat/9504096 · doi:10.1088/0305-4470/28/16/004
Abstract
It is found that the Hamiltonian of S=1/2 isotropic Heisenberg chain with sites and elliptic non-nearest-neighbor exchange is diagonalized in each sector of the Hilbert space with magnetization , , by means of double quasiperiodic meromorphic solutions to the -particle quantum Calogero-Moser problem on a line. The spectrum and highest-weight states are determined by the solutions of the systems of transcendental equations of the Bethe-ansatz type which arise as restrictions to particle pseudomomenta.
9 pages, Latex