Exact Eigenstates of the Hubbard Model Independent of the On-Site Electron Interaction

被引：3
|
作者：
Ye, Ming-Yong [1 ,2 ,3 ]
Lin, Xiu-Min [1 ,2 ]
机构：
[1] Fujian Normal Univ, Fujian Prov Key Lab Quantum Manipulat & New Energ, Coll Phys & Energy, Fuzhou 350117, Fujian, Peoples R China
[2] Fujian Prov Collaborat Innovat Ctr Optoelect Semi, Xiamen 361005, Peoples R China
[3] Univ Sci & Technol China, Chinese Acad Sci, Key Lab Quantum Informat, Hefei 230026, Anhui, Peoples R China
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2018年 / 255卷 / 03期
基金：
中国国家自然科学基金;
关键词：
eigenstates; electrons; Hubbard model; two-dimensional; FERROMAGNETISM; SYSTEMS; CHARGE; RANGE;
D O I：
10.1002/pssb.201700321
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Two-dimensional Hubbard model is important to understand the high temperature superconductivity. We give several methods to construct exact eigenstates of the two-dimensional Hubbard model that are independent of the on-site electron interaction. The number of electrons in some eigenstates can be of the order of the lattice sites. It is shown that the existence of eigenstates independent of the electron interactions is a common feature of the extended Hubbard models that have short-range interactions, and some eigenstates we construct can be used to represent eigenstates of the two-dimensional Bose-Hubbard model.
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页数：5
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