The "valence-bond" ground states for extended Heisenberg models discussed by Affleck et al. are shown to be of a Jastrow form. We discuss a striking analogy between these models and the "truncated pseudopotential" approach to the fractional quantum Hall effect. The valence-bond states are in analogy to the Laughlin ground state, and the magnon spectrum is deduced by use of a single-mode approximation.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)