Geometric measure of quantum discord

doi:10.1103/PhysRevA.82.034302

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	Geometric measure of quantum discord
	Luo, Shunlong; Fu, Shuangshuang
	2010-09-13
发表期刊	PHYSICAL REVIEW A
ISSN	1050-2947
卷号	82 期号:3 页码:4
摘要	Dakic, Vedral, and Brukner [arXiv:1004.0190 (2010)] introduced a geometric measure of quantum discord and derived an explicit formula for any two-qubit state. This measure is significant in capturing quantum correlations from a geometric perspective. In this brief report, we evaluate the geometric measure of quantum discord for an arbitrary state and obtain an explicit and tight lower bound. Furthermore, we reveal an intrinsic feature of geometric measure of quantum discord by showing that it actually coincides with a simpler quantity based on von Neumann measurements.
DOI	10.1103/PhysRevA.82.034302
语种	英语
资助项目	National Natural Science Foundation of China[10771208] ; Science Fund for Creative Research Groups[10721101] ; Key Lab of Random Complex Structures and Data Science, Chinese Academy of Sciences[2008DP173182]
WOS研究方向	Optics ; Physics
WOS类目	Optics ; Physics, Atomic, Molecular & Chemical
WOS记录号	WOS:000281779000016
出版者	AMER PHYSICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/9495
专题	应用数学研究所
通讯作者	Luo, Shunlong
作者单位	Chinese Acad Sci, Acad Math & Syst Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Luo, Shunlong,Fu, Shuangshuang. Geometric measure of quantum discord[J]. PHYSICAL REVIEW A,2010,82(3):4.
APA	Luo, Shunlong,&Fu, Shuangshuang.(2010).Geometric measure of quantum discord.PHYSICAL REVIEW A,82(3),4.
MLA	Luo, Shunlong,et al."Geometric measure of quantum discord".PHYSICAL REVIEW A 82.3(2010):4.