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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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.

Original language	English
Article number	008
Pages (from-to)	1456-1459
Number of pages	4
Journal	Chinese Physics Letters
Volume	24
Issue number	6
DOIs	https://doi.org/10.1088/0256-307X/24/6/008
Publication status	Published - 1 Jun 2007
Externally published	Yes

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

Abstract

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