Abstract
The S=1/2 Heisenberg Hamiltonian H=1/2⋅ , with =/(nπ/N), is shown to have a simple singlet ground state in the form of a Jastrow function. The spectrum and correlations are explicitly known and the magnetic susceptibility is shown to be Pauli type at T=0. The model has a striking similarity to the nearest-neighbor isotropic Heisenberg model and may be viewed as a discretized version of the Sutherland-Calogero-Moser system.
- Received 24 December 1987
DOI:https://doi.org/10.1103/PhysRevLett.60.639
©1988 American Physical Society