[1]赵华,李华艳,周晓凡.自旋轨道耦合对超冷排斥费米气体相变的影响[J].深圳大学学报理工版,2014,31(6):570-575.[doi:10.3724/SP.J.1249.2014.06570]
 Zhao Hua,Li Huayan,and Zhou Xiaofan.Effects of the spin-orbit coupling on the phase transition of ultra cold repulsive Fermi gases[J].Journal of Shenzhen University Science and Engineering,2014,31(6):570-575.[doi:10.3724/SP.J.1249.2014.06570]
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自旋轨道耦合对超冷排斥费米气体相变的影响()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第31卷
期数:
2014年第6期
页码:
570-575
栏目:
物理
出版日期:
2014-11-20

文章信息/Info

Title:
Effects of the spin-orbit coupling on the phase transition of ultra cold repulsive Fermi gases
文章编号:
201406003
作者:
赵华1李华艳1周晓凡2
1)深圳大学物理科学与技术学院, 深圳 518060
2)山西大学理论物理研究所,太原 030006
Author(s):
Zhao Hua1 Li Huayan1 and Zhou Xiaofan2
1) College of Physics Science and Technology, Shenzhen University, Shenzhen 518060, P.R.China
2) Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, P.R.China
关键词:
凝聚态物理Fermi-Hubbard模型密度矩阵重整化群光学晶格自旋轨道耦合Zeeman场Mott绝缘态
Keywords:
condensed matter physics Fermi-Hubbard model density-matrix-renormalization-group (DMRG) optical lattice spin-orbit coupling (SOC) Zeeman field Mott insulator phase
分类号:
O 469
DOI:
10.3724/SP.J.1249.2014.06570
文献标志码:
A
摘要:
利用密度矩阵重整化群(density-matrix-renormalization-group,DMRG)方法,研究自旋轨道耦合和Zeeman场作用下处于一维光学晶格中的排斥费米气体的量子相变.研究表明,当自旋轨道耦合与Zeeman场共同作用于系统时,自旋轨道耦合效应将增强系统的金属性,同时削弱Zeeman场对系统的极化作用.当自旋轨道耦合作用较弱使系统保持为Mott绝缘态时,随自旋轨道耦合强度的变化,Zeeman场的极化效应使系统呈现不同的量子态.
Abstract:
By using the density-matrix-renormalization-group (DMRG) method, the phase transition of ultra-cold repulsive Fermi gases loaded on one-dimensional optical lattices is investigated when spin-orbit coupling (SOC) and Zeeman field are involved. It is found that the SOC effects enhance the metal phase and reduce the polarization of the system in the presence of both the SOC and a large Zeeman field. Furthermore, when the system keeps a Mott insulation state under the weak spin orbit coupling, it is shown at different SOC strengths, the system appears as different quantum states due to the polarization effect of Zeeman field.

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备注/Memo

备注/Memo:
Received:2014-03-21;Revised:2014-08-17;Accepted:2014-09-08
Foundation:National Natural Science Foundation of China (10774095); Shenzhen Science and Technology Research Foundation (JC201005280474A)
Corresponding author:Associate professor Zhao Hua.E-mail: zhaohua@szu.edu.cn
Citation:Zhao Hua, Li Huayan,Zhou Xiaofan.Effects of the spin-orbit coupling on the phase transition of ultra cold repulsive Fermi gases[J]. Journal of Shenzhen University Science and Engineering, 2014, 31(6): 570-575.(in Chinese)
基金项目:国家自然科学基金资金项目(10774095);深圳市科技研发基金资助项目(JC201005280474A)
作者简介:赵华(1973—),女(汉族),山西省中阳县人,深圳大学副教授、博士.E-mail:zhaohua@szu.edu.cn
引文:赵华,李华艳,周晓凡.自旋轨道耦合对超冷排斥费米气体相变的影响[J]. 深圳大学学报理工版,2014,31(6):570-575.
更新日期/Last Update: 2014-10-29