Concurrence and fidelity of a Bose-Fermi mixture in a one-dimensional optical lattice

被引：19

作者：

Ning, Wen-Qiang ^{[1
,2
,3
]}

Gu, Shi-Jian ^{[2
,3
]}

Chen, Yu-Guang ^{[4
]}

Wu, Chang-Qin ^{[1
]}

Lin, Hai-Qing ^{[2
,3
]}

机构：

[1] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[2] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

[3] Fudan Univ, Inst Theoret Phys, Shanghai 200433, Peoples R China

[4] Tongji Univ, Dept Phys, Shanghai 200092, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 23期

关键词：

D O I：

10.1088/0953-8984/20/23/235236

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study the ground-state fidelity and entanglement of a Bose-Fermi mixture loaded in a one-dimensional optical lattice. It is found that the fidelity is able to signal quantum phase transitions between the Luttinger liquid phase, the density-wave phase, and the phase separation state of the system, and the concurrence, as a measure of the entanglement, can be used to signal the transition between the density-wave phase and the Ising phase.

引用

页数：5

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