| Issue |
Europhys. Lett.
Volume 35, Number 5, August II 1996
|
|
|---|---|---|
| Page(s) | 321 - 326 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i1996-00113-x | |
| Published online | 01 September 2002 | |
The spectrum of the two-dimensional Hubbard model at low filling
Centre de Recherches sur les Très Basses Températures,
CNRS, B.P. 166, F-38042 Grenoble Cédex 9, France
Received:
1
April
1996
Accepted:
26
June
1996
The entire energy spectrum is calculated numerically for the
two-dimensional Hubbard model on square lattices with four electrons
varying the interaction strength U in a wide range.
Taking all symmetries explicitly into account a level statistical
analysis is performed on this strongly correlated 2D system. The level
spacing distribution and the number variance exhibit a random matrix
(GOE) behavior for all positive values of U, the latter
however only up to a medium energy scale 
independent of U.
PACS: 05.45.+b – Theory and models of chaotic systems / 75.10.Jm – Quantized spin models / 74.20.-z – Theory
© EDP Sciences, 1996
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.