Quantum Fisher information of the Greenberg-Horne-Zeilinger state in decoherence channels

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	Quantum Fisher information of the Greenberg-Horne-Zeilinger state in decoherence channels
	Sun, CP
刊名	PHYSICAL REVIEW A
	2011
卷号	84 期号:2 页码:22302
关键词	STATISTICAL DISTANCE HILBERT-SPACE SUDDEN-DEATH ENTANGLEMENT METROLOGY LIMIT
ISSN号	1050-2947
通讯作者	Ma, J (reprint author), Zhejiang Univ, Dept Phys, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China.
英文摘要	Quantum Fisher information of a parameter characterizes the sensitivity of the state with respect to changes of the parameter. In this article, we study the quantum Fisher information of a state with respect to SU(2) rotations under three decoherence channels: the amplitude-damping, phase-damping, and depolarizing channels. The initial state is chosen to be a Greenberg-Horne-Zeilinger state of which the phase sensitivity can achieve the Heisenberg limit. By using the Kraus operator representation, the quantum Fisher information is obtained analytically. We observe the decay and sudden change of the quantum Fisher information in all three channels.
学科主题	Physics
收录类别	SCI
资助信息	NSFC [11025527, 10874151, 10935010]; Ministry of Education
原文出处	http://dx.doi.org/10.1103/PhysRevA.84.022302
语种	英语
WOS记录号	WOS:000293373900006
公开日期	2013-05-17
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/14298]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Sun, CP. Quantum Fisher information of the Greenberg-Horne-Zeilinger state in decoherence channels[J]. PHYSICAL REVIEW A,2011,84(2):22302.
APA	Sun, CP.(2011).Quantum Fisher information of the Greenberg-Horne-Zeilinger state in decoherence channels.PHYSICAL REVIEW A,84(2),22302.
MLA	Sun, CP."Quantum Fisher information of the Greenberg-Horne-Zeilinger state in decoherence channels".PHYSICAL REVIEW A 84.2(2011):22302.