Abstract
We demonstrate explicitly the SU(2) gauge invariance of the large- limit of the Hubbard model, i.e., the Heisenberg model written in terms of electron operators with a constraint of one particle per site. We use this result to demonstrate the equivalence of two apparently very different mean-field theories.
- Received 28 December 1987
DOI:https://doi.org/10.1103/PhysRevB.38.745
©1988 American Physical Society