中国物理B ›› 2010, Vol. 19 ›› Issue (10): 100311-100311.doi: 10.1088/1674-1056/19/10/100311
廖洁桥1, 王琼2, 曾浩生2
收稿日期:
2010-01-23
修回日期:
2010-03-19
出版日期:
2010-10-15
发布日期:
2010-10-15
基金资助:
Wang Qiong(王琼)a), Liao Jie-Qiao(廖洁桥) b), and Zeng Hao-Sheng(曾浩生)a)†
Received:
2010-01-23
Revised:
2010-03-19
Online:
2010-10-15
Published:
2010-10-15
Supported by:
摘要: We study the quantum discord in a two-spin-1/2 XXZ model in thermal equilibrium at temperature T in the presence of an external magnetic field B. Special attention is paid to the dependence of quantum discord on the temperature T and magnetic field B. It is found that quantum thermal discord is more robust than concurrence against temperature, in the sense that quantum thermal discord does not vanish at finite temperatures, but concurrence vanishes completely at a critical temperature.
中图分类号: (Entanglement and quantum nonlocality)
王琼, 廖洁桥, 曾浩生. Quantum thermal discord in a two-spin-1/2 XXZ model[J]. 中国物理B, 2010, 19(10): 100311-100311.
Wang Qiong(王琼), Liao Jie-Qiao(廖洁桥), and Zeng Hao-Sheng(曾浩生). Quantum thermal discord in a two-spin-1/2 XXZ model[J]. Chin. Phys. B, 2010, 19(10): 100311-100311.
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