Theoretical concept of error-rejecting entanglement purification of quantum-dots electronic spins in single-sided optical microcavity

IF 2.8 2区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY
Jingyao Wang, Xin Wang
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引用次数: 0

Abstract

We use the quantum-dots (QD) coupled with single-sided microcavities system to construct the error-rejecting controlled not (CNOT) gate of electronic spins system in QD; We have designed an error-rejecting entanglement purification protocol (EPP) of electronic spins system in QD by using the error-rejecting CNOT gate and unitary operation. It can extract the high entanglement from the mixed entanglement states of the electronic spins with low entangled states. This EPP can eliminate the operation errors caused by the nonideal interaction between photons and QD coupled with optical microcavities system, and improve the fidelity of the EPP through iteration. Our scheme is more practical in future long-distance quantum communications, especially providing significant benefits for solving decoherence problems in quantum networks and quantum repeaters.
单面光学微腔中量子点电子自旋纠缠净化的拒错理论概念
我们利用量子点(QD)与单面微腔系统耦合,构建了QD中电子自旋系统的错误剔除受控不(CNOT)门;利用错误剔除CNOT门和单元运算,我们设计了QD中电子自旋系统的错误剔除纠缠纯化协议(EPP)。它能从电子自旋与低纠缠态的混合纠缠态中提取高纠缠。这种 EPP 可以消除光子与 QD 之间的非理想相互作用以及与光学微腔系统的耦合所造成的运算误差,并通过迭代提高 EPP 的保真度。我们的方案在未来的长距离量子通信中更具实用性,特别是在解决量子网络和量子中继器中的退相干问题方面具有显著优势。
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来源期刊
New Journal of Physics
New Journal of Physics 物理-物理:综合
CiteScore
6.20
自引率
3.00%
发文量
504
审稿时长
3.1 months
期刊介绍: New Journal of Physics publishes across the whole of physics, encompassing pure, applied, theoretical and experimental research, as well as interdisciplinary topics where physics forms the central theme. All content is permanently free to read and the journal is funded by an article publication charge.
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