Abstract
We have developed a numerical renormalization-group approach for finite fermion systems, related to the approach used by Wilson for the Kondo problem. Results are similar to those of exact diagonalizations; however, larger systems can be studied and results are obtained for the ground state and many excited states simultaneously. Results for 4×4 Hubbard lattices are given.
- Received 25 November 1991
DOI:https://doi.org/10.1103/PhysRevB.45.5752
©1992 American Physical Society