Observable Correlations in Two-Qubit States

doi:10.1007/s10955-009-9779-0

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	Observable Correlations in Two-Qubit States
	Luo, Shunlong1 ; Zhang, Qiang 2
	2009-07-01
发表期刊	JOURNAL OF STATISTICAL PHYSICS
ISSN	0022-4715
卷号	136 期号:1 页码:165-177
摘要	The total correlations in a bipartite quantum state are well quantified by the quantum mutual information, the amount of which is not necessarily fully extractable by local measurements. The observable correlations are the maximal correlations that can be extracted via local measurements, and have an intuitive interpretation as a measure of classical correlations. We evaluate the observable correlations for generic two-qubit states and obtain analytical expressions in some particular cases. The intricate and subtle relationships among the total, quantum and classical correlations are illustrated in terms of observable correlations. In the course, we also disprove an intuitive conjecture of Lindblad which states that the classical correlations account for at least half of the total correlations, or equivalently, correlations are more classical than quantum.
关键词	Quantum mutual information Von Neumann measurement Observable correlations Classical correlations Lindblad conjecture
DOI	10.1007/s10955-009-9779-0
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Mathematical
WOS记录号	WOS:000268327600012
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/7306
专题	应用数学研究所
通讯作者	Luo, Shunlong
作者单位	1.Chinese Acad Sci, Acad Math & Syst Sci, Beijing 100190, Peoples R China 2.City Univ Hong Kong, Dept Math, Hong Kong, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Luo, Shunlong,Zhang, Qiang. Observable Correlations in Two-Qubit States[J]. JOURNAL OF STATISTICAL PHYSICS,2009,136(1):165-177.
APA	Luo, Shunlong,&Zhang, Qiang.(2009).Observable Correlations in Two-Qubit States.JOURNAL OF STATISTICAL PHYSICS,136(1),165-177.
MLA	Luo, Shunlong,et al."Observable Correlations in Two-Qubit States".JOURNAL OF STATISTICAL PHYSICS 136.1(2009):165-177.