We describe a new approach to the ground state antiferromagnetic phase of the infinite-dimensional Hubbard model. The theory recovers correctly both the strong coupling Heisenberg limit at $\frac{1}{2}$ filling and the t-J limit in the one-hole sector, appears applicable over a wide $U$ range, and is readily extended to finite dimensions.

• Received 27 September 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.4785