THE ONE-DIMENSIONAL HUBBARD MODEL IN THE LIMIT OF u >> t

被引：1

作者：

Jakubczyk, Dorota ^{[1
]}

机构：

[1] Rzeszow Univ Technol, Fac Math & Appl Phys, Al Powstancow Warszawy 12, PL-35959 Rzeszow, Poland

来源：

REPORTS ON MATHEMATICAL PHYSICS | 2019年 / 83卷 / 02期

关键词：

Hubbard model; half-filling; spin; pseudo-spin; electron configuration; cyclic group; ENTANGLEMENT; SYMMETRY; STATES; DIAGONALIZATION;

D O I：

10.1016/S0034-4877(19)30035-7

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We revisit the one-dimensional Hubbard model in the case of strong correlations, i.e. for on-site repulsion constant strongly greater than hopping constant u >> t, and assume that each atom has only a single relevant orbital. We present in detail the example of half-filled system with four atoms. We reconfirm that when the sites are almost independent atoms, i.e. in the atomic limit, the spin-spin coupling term appears, every site carries exactly one electron and hopping is suppressed. We compare the results with one-dimensional Heisenberg Hamiltonian using the translational and unitary symmetries, and separation of the spin and pseudo-spin degrees of freedom.

引用

页码：139 / 162

页数：24

共 29 条

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