Information-disturbance tradeoff in estimating the unknown three-qubit GHZ state

Sheng Li Zhang; Xu Bo Zou; Ke Li; Chen Hui Jin; Guang Can Guo

doi:10.1088/0256-307X/24/6/008

Information-disturbance tradeoff in estimating the unknown three-qubit GHZ state

Sheng Li Zhang^*
, Xu Bo Zou
, Ke Li
, Chen Hui Jin
, Guang Can Guo

^*此作品的通讯作者

University of Science and Technology of China
Information Engineering University

科研成果: 期刊稿件 › 文章 › 同行评审

2 引用（Scopus）

摘要

In a recent paper, Sacchi (Phys. Rev. Lett. 96(2006)220502) studied the information-disturbance tradeoff in estimating an unknown two-qubit maximally entangled state. In this study, we explore the tradeoff in estimating an unknown three-qubit GHZ state. The optimal estimation process supplies a fidelity of (13/54) and the tradeoff interpolates smoothly between non-informative measurement and optimal estimation process.

源语言	英语
文章编号	008
页（从-至）	1456-1459
页数	4
期刊	Chinese Physics Letters
卷	24
期	6
DOI	https://doi.org/10.1088/0256-307X/24/6/008
出版状态	已出版 - 1 6月 2007
已对外发布	是

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abstract = "In a recent paper, Sacchi (Phys. Rev. Lett. 96(2006)220502) studied the information-disturbance tradeoff in estimating an unknown two-qubit maximally entangled state. In this study, we explore the tradeoff in estimating an unknown three-qubit GHZ state. The optimal estimation process supplies a fidelity of (13/54) and the tradeoff interpolates smoothly between non-informative measurement and optimal estimation process.",

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AU - Jin, Chen Hui

AU - Guo, Guang Can

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AB - In a recent paper, Sacchi (Phys. Rev. Lett. 96(2006)220502) studied the information-disturbance tradeoff in estimating an unknown two-qubit maximally entangled state. In this study, we explore the tradeoff in estimating an unknown three-qubit GHZ state. The optimal estimation process supplies a fidelity of (13/54) and the tradeoff interpolates smoothly between non-informative measurement and optimal estimation process.

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Information-disturbance tradeoff in estimating the unknown three-qubit GHZ state

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