Decoherence suppression for three-qubit W-like state using weak measurement and iteration method
Decoherence suppression for three-qubit W-like state using weak measurement and iteration method
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DOI：
10.1088/1674-1056/25/8/080310
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发表时间：
2016-06
影响因子：
1.7
通讯作者：
Guang Yang;B. Lian;Min Nie
中科院分区：
文献类型：
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作者：
Guang Yang;B. Lian;Min Nie
多量子位纠缠态是各种多方量子通信任务的关键资源。对于一类广义三量子位量子纠缠，类W态，我们证明弱测量和反转测量能够通过将初始阻尼因子减小为更小的等效阻尼因子来抑制振幅阻尼退相干。此外，我们提出了弱测量和反转测量中的迭代方法，以提高总测量的成功概率。最后，我们讨论了迭代次数如何影响退相干抑制的整体效果，发现“半迭代”方法是一个更好的选择，更具有实用价值。
Multi-qubit entanglement states are the key resources for various multipartite quantum communication tasks. For a class of generalized three-qubit quantum entanglement, W-like state, we demonstrate that the weak measurement and the reversal measurement are capable of suppressing the amplitude damping decoherence by reducing the initial damping factor into a smaller equivalent damping factor. Furthermore, we propose an iteration method in the weak measurement and the reversal measurement to enhance the success probability of the total measurements. Finally, we discuss how the number of the iterations influences the overall effect of decoherence suppression, and find that the "half iteration" method is a better option that has more practical value.