| 两类纠缠相干态的非局域性研究 |
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| 引用本文： | 龚仁山.两类纠缠相干态的非局域性研究[J].南昌大学学报(理科版),2004,28(4):368-370. |
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| 作者姓名： | 龚仁山 |
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| 作者单位： | 南昌大学,物理学系,江西,南昌,330047 |
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| 摘 要： | 利用Horodecki提出的违背Bell-CHSH不等式的判据研究了两类纠缠相干态的量子非局域性，导出了计算最大Bell-CHSH算符期望值的解析公式。研究表明，纠缠相干态的非局域度与相干态的强度及相干态的位相相关，在一定的强度一位相关系下纠缠相干态会失去非局域性。
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| 关 键 词： | 量子信息论 非局域性 纠缠相干态 |
| 文章编号： | 1006-0464(2004)04-0368-03 |
| 修稿时间： | 2004年3月15日 |
ON THE NONLOCALITY OF TWO KINDS OF ENTANGLED COHERENT STATES |
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| GONG Ren-shan.ON THE NONLOCALITY OF TWO KINDS OF ENTANGLED COHERENT STATES[J].Journal of Nanchang University(Natural Science),2004,28(4):368-370. |
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| Authors: | GONG Ren-shan |
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| Abstract: | By using the criterion for violating Bell-CHSH inequality proposed by Horodecki,we have studied the quantum nonlocality of two kinds of entangled coherent states.Some formulas for evaluating the maximal expectation values of Bell-CHSH type operators of these entangled coherent states are derived.It is shown that the quantum nonlocality has relations with the strength and phase of coherent state.When some relations of the strength and phase are satisfied the nonlocality of entangled coherent states may disappear. |
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| Keywords: | quantum information theory nonlocality entangled coherent state |
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