Quantum repeater without Bell measurements in double-quantum-dot systems

Quantum repeater without Bell measurements in double-quantum-dot systems
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双量子点系统中无需贝尔测量的量子中继器

DOI:
10.1007/s11128-019-2185-x
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发表时间:
2017-12
影响因子:
2.5
通讯作者:
Quan Xianfu
Quan Xianfu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Yi Xiao-Feng;Xu Peng;Yao Qi;Quan Xianfu

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我们提出了一种在GaAs/AlGaAs双量子点系统中实现量子中继器的无贝尔测量方案。在初始态为单重态的条件下,证明了四对双量子点构成一个纠缠单元。不同于著名的DLCZ协议,我们的方案不需要贝尔测量来进行纠缠交换,这为实验实现提供了很大的优势和方便。该方案显著提高了基于固态量子器件的量子中继器的成功率。
We propose a Bell measurement-free scheme to implement a quantum repeater in GaAs/AlGaAs double-quantum-dot systems. We prove that four pairs of double quantum dots compose an entanglement unit, given that the initial state is singlet states. Our scheme differs from the famous Duan–Lukin–Cirac–Zoller (DLCZ) protocol in that Bell measurements are unnecessary for the entanglement swapping, which provides great advantages and conveniences in experimental implementations. Our scheme significantly improves the success probability of quantum repeaters based on solid-state quantum devices.
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