Quantum entanglement investigation on impurity effects in the transverse Ising chain
Huang, XC (Huang, Xuchu)1; Si, TY (Si, Tieyan)1; Yang, ZH (Yang, Zhihua)1
2015
发表期刊PHYSICA B-CONDENSED MATTER
ISSN0921-4526
卷号462期号:4页码:25-29
摘要

The impurity effects of the transverse Ising spin model with a magnetic impurity are investigated via the correlation function and entanglement on the basis of an exact solution. The non-analytical transition point from an ordered phase to a disorder phase is significantly shifted by the impurity coupling with local host spins. The maximal entanglement point which usually appears around the critical point shows strong dependence on the impurity coupling strength with local host spin and the independent transverse field upon the impurity itself. Quantum entanglement in disordered spin phase is much stronger than that in ordered spin phase. The exact concurrence of impurity spin with local host spin suddenly increases to a large value from zero at a threshold value. The maximal entanglement point between impurity and local host spin increases as the impurity coupling strength increases. So the impurity coupling strength and local transverse field on the impurity can control position of critical point and maximal entanglement point.

关键词Impurity Effect Quantum Entanglement Correlation Function Concurrence
DOI10.1016/j.physb.2015.01.007
收录类别SCI
语种英语
WOS记录号WOS:000350812000005
引用统计
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/4898
专题中国科学院特殊环境功能材料与器件重点试验室
材料物理与化学研究室
通讯作者Yang, ZH (Yang, Zhihua)
作者单位1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Harbin Inst Technol, Harbin 150001, Peoples R China
推荐引用方式
GB/T 7714
Huang, XC ,Si, TY ,Yang, ZH . Quantum entanglement investigation on impurity effects in the transverse Ising chain[J]. PHYSICA B-CONDENSED MATTER,2015,462(4):25-29.
APA Huang, XC ,Si, TY ,&Yang, ZH .(2015).Quantum entanglement investigation on impurity effects in the transverse Ising chain.PHYSICA B-CONDENSED MATTER,462(4),25-29.
MLA Huang, XC ,et al."Quantum entanglement investigation on impurity effects in the transverse Ising chain".PHYSICA B-CONDENSED MATTER 462.4(2015):25-29.
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