Relation between two measures of entanglement in spin-1/2 and spinless fermion quantum chain systems

被引：1

作者：

Qian, Xiao-Feng ^{[1
]}

Song, Z. ^{[1
]}

机构：

[1] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China

来源：

PHYSICAL REVIEW A | 2006年 / 74卷 / 02期

关键词：

STATE;

D O I：

10.1103/PhysRevA.74.022302

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The concepts of concurrence and mode concurrence are the measures of entanglement for spin-1/2 and spinless fermion systems, respectively. Based on the Jordan-Wigner transformation, any spin-1/2 system is always associated with a fermion system (called the counterpart system). A comparison of concurrence and mode concurrence can be made with the aid of Marshall's sign rule for the ground states of spin-1/2 XXZ and spinless fermion chain systems. We observe that there exists an inequality between concurrence and mode concurrence for the ground states of the two corresponding systems. The spin-1/2 XY chain system and its spinless fermion counterpart as a realistic example are discussed to demonstrate the analytical results.

引用

页数：6

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