The ground-state entanglement in the spin-XX chain with a magnetization current

doi:10.1088/1674-1056/19/11/110308

中国物理B ›› 2010, Vol. 19 ›› Issue (11): 110308-110313.doi: 10.1088/1674-1056/19/11/110308

The ground-state entanglement in the spin-XX chain with a magnetization current

张勇, 王川, 金光生

Department of Physics, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2010-04-09 修回日期:2010-06-02 出版日期:2010-11-15 发布日期:2010-11-15
基金资助:
Project supported by the National Fundamental Research Program of China (Grant No. 2010CB923202), the National Natural Science Foundation of China (Grant Nos. 10704010, 10947151 and 60704017), Chinese Universities Scientific Fund (Grant No. BUPT2009RC0710), and the SRFDP Program of Education Ministry of China.

The ground-state entanglement in the spin-XX chain with a magnetization current

Zhang Yong(张勇)^†, Wang Chuan(王川), and Jin Guang-Sheng(金光生)

Department of Physics, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2010-04-09 Revised:2010-06-02 Online:2010-11-15 Published:2010-11-15
Supported by:
Project supported by the National Fundamental Research Program of China (Grant No. 2010CB923202), the National Natural Science Foundation of China (Grant Nos. 10704010, 10947151 and 60704017), Chinese Universities Scientific Fund (Grant No. BUPT2009RC0710), and the SRFDP Program of Education Ministry of China.

摘要/Abstract

摘要： The ground-state entanglement in a transverse spin-1/2 XX chain with a magnetization current is studied. By introducing a magnetization current to the system, a quantum phase transition to current-carrying phase may be presented with the variation of the driving field λ for the magnetic field h>1; and the ground-state entanglement arises simultaneously at the critical point of quantum phase transition. In our model, the introduction of magnetization current may result in more entanglement between any two nearest-neighbour spins.

Abstract: The ground-state entanglement in a transverse spin-1/2 XX chain with a magnetization current is studied. By introducing a magnetization current to the system, a quantum phase transition to current-carrying phase may be presented with the variation of the driving field $\lambda$ for the magnetic field h >1; and the ground-state entanglement arises simultaneously at the critical point of quantum phase transition. In our model, the introduction of magnetization current may result in more entanglement between any two nearest-neighbour spins.

Key words: entanglement, current, correlation, concurrence

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

75.40.-s (Critical-point effects, specific heats, short-range order) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)

张勇, 王川, 金光生. The ground-state entanglement in the spin-XX chain with a magnetization current[J]. 中国物理B, 2010, 19(11): 110308-110313.

Zhang Yong(张勇), Wang Chuan(王川), and Jin Guang-Sheng(金光生). The ground-state entanglement in the spin-XX chain with a magnetization current[J]. Chin. Phys. B, 2010, 19(11): 110308-110313.

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The ground-state entanglement in the spin-XX chain with a magnetization current

The ground-state entanglement in the spin-XX chain with a magnetization current

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