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 t-J model. We confirm the tendency of holes to repel, although a significant value of the d(x2-y2)-wave superconductive order parameter is measured. These data represent a benchmark for future quantum simulations.

Ground-state properties of the Hubbard model by Lanczos diagonalizations

Becca F;
2000-01-01

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 t-J model. We confirm the tendency of holes to repel, although a significant value of the d(x2-y2)-wave superconductive order parameter is measured. These data represent a benchmark for future quantum simulations.
2000
Pubblicato
http://link.aps.org/doi/10.1103/PhysRevB.61.R16287
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2939759
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