Quantum Entanglement in Ground State of Extended Hubbard Model

被引：1

作者：

Harir, S. ^{[1
,2
]}

Zouhair, A. ^{[1
]}

Boulahia, Z. ^{[3
]}

Kazaz, M. ^{[4
]}

Boughaleb, Y. ^{[1
]}

机构：

[1] Hassan II Univ, Higher Normal Sch, Lab Biogeosci & Mat Engn, Casablanca, Morocco

[2] Reg Ctr Profess Educ & Training, Dept Chem & Phys, Casablanca, Morocco

[3] Hassan II Univ, Fac Sci Ain Chock, Lab Mech, Casablanca, Morocco

[4] Univ Mohammed 5, LPHE Modeling & Simulat, Fac Sci, Rabat, Morocco

来源：

INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2019年 / 58卷 / 09期

关键词：

Quantum phase transition; Quantum entanglement; 1D extended Hubbard model; CHARGE;

D O I：

10.1007/s10773-019-04191-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Metal-insulator and CDW-SDW transitions are studied in the one-dimensional Extended Hubbard Model at half-filling by analysing the behaviour of local entanglement in fermionic systems. 1D traditional Hubbard model exhibits metal-insulator transition at critical point U-c = 0, where local entanglement reaches its maximum value. Moreover, a transition between charge- and spin-density- wave (CDW-SDW) occurs in 1D Extended Hubbard Model tUV with long-range interaction at straight line U = 2 V. The analysis of our obtained results shows that CDW-SDW transition has curious properties whose can be used in quantum information processing.

引用

页码：3149 / 3157

页数：9

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