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Enhancing teleportation of quantum Fisher information by partial measurements

机译:通过部分测量增强量子Fisher信息的隐形传态

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摘要

The purport of quantum teleportation is to completely transfer information from one party to another distant partner. However, from the perspective of parameter estimation, it is the information carried by a particular parameter, not the information of total quantum state that needs to be teleported. Due to the inevitable noise in environments, we propose two schemes to enhance quantum Fisher information (QFI) teleportation under amplitude damping noise with the technique of partial measurements. We find that post-partial measurement can greatly enhance the teleported QFI, while the combination of prior partial measurement and post-partial measurement reversal could completely eliminate the effect of decoherence. We show that, somewhat consequentially, enhancing QFI teleportation is more economic than that of improving fidelity teleportation. Our work extends the ability of partial measurements as a quantum technique to battle decoherence in quantum information processing.
机译:量子隐形传态的目的是将信息从一方完全转移到另一位远方。但是,从参数估计的角度来看,需要传送的是特定参数携带的信息,而不是总量子态的信息。由于环境中不可避免的噪声,我们提出了两种方案来利用部分测量技术来增强振幅阻尼噪声下的量子Fisher信息(QFI)隐形传态。我们发现,部分后测量可以极大地增强传送的QFI,而先前的部分测量和部分后的测量反转的结合可以完全消除去相干的影响。我们证明,从某种程度上来说,增强QFI传送比改进保真传送更经济。我们的工作扩展了作为量子技术的部分测量的能力,以对抗量子信息处理中的退相干。

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