Abstract
We investigate the Hubbard model on a two-dimensional cluster of 18 sites using Lanczos algorithm for different strengths of Coulomb repulsion in the low doping region. Energies and correlation functions are given for half-filling and two holes. In the strong coupling regime we compare our results with the model. We confirm the tendency of holes to repel, although a significant value of the -wave superconductive order parameter is measured. These data represent a benchmark for future quantum simulations.
- Received 4 April 2000
DOI:https://doi.org/10.1103/PhysRevB.61.R16287
©2000 American Physical Society