Introduction: The Two Bethe Ansätze

Bill Sutherland

Michael Karabach, Gerhard H. Muller, Harvey Gould +1 more

N. A. Slavnov

Leon A. Takhtajan

Michael Karbach, Gerhard H. Muller

The Bethe ansatz for the one-dimensional s=1/2 Heisenberg ferromagnet is introduced at an elementary level. The presentation follows Bethe's original work very closely. A detailed description and a complete classification of all two-magnon scattering states and two-magnon bound states are given for finite and infinite chains. The paper is designed as a tutorial for beginning graduate students. It includes 10 problems for further study.

Gleb Eduardovich Arutyunov