The Ground and Low Lying Excited States of the Two-Dimensional Hubbard Model
| dc.creator | ASAI, Yoshihiro | |
| dc.date | 1999-04-22 | |
| dc.date.accessioned | 2026-07-07T03:13:18Z | |
| dc.date.available | 2026-07-07T03:13:18Z | |
| dc.description | We have studied the ground state of the two-dimensional (2D) Hubbard model by using a quantum monte method paying special attention to the shell structure effect on finite size clusters. Our calculations show there is a gap for spin excitations in the ground state and incommensurate peaks at $(π\pm δ, π)$ and $(π, π\pm δ)$ in the spin correlation function for a low lying excited state. In the ground state, the long range part of the d-wave superconducting correlation function is enhanced and the momentum distribution function at the Fermi level $(π,0)$ is rounded. The gap in spin excitations and the momentum distribution function rounding is consistent with opening a d-wave superconducting gap in the ground state. | |
| dc.description | RevTex3.0, 4 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9904310 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9904310 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/29245 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Superconductivity | |
| dc.title | The Ground and Low Lying Excited States of the Two-Dimensional Hubbard Model | |
| dc.type | text |