High-Rate, High-Fidelity Entanglement of Qubits Across an Elementary Quantum Network.
High-Rate, High-Fidelity Entanglement of Qubits Across an Elementary Quantum Network.
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DOI：
10.1103/physrevlett.124.110501
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发表时间：
2019-11
影响因子：
8.6
通讯作者：
L. J. Stephenson;D. P. Nadlinger;B. C. Nichol;S. An;P. Drmota;T. Ballance;K. Thirumalai;J. Goodwin;D. Lucas;C. Ballance
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文献类型：
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作者：
L. J. Stephenson;D. P. Nadlinger;B. C. Nichol;S. An;P. Drmota;T. Ballance;K. Thirumalai;J. Goodwin;D. Lucas;C. Ballance
我们通过量子光纤链接与富裕的链接进行了远程纠缠，并通过fifelity和速率接近局部操作的速度。 NM照片由高数字孔径镜头耦合到单模光纤上，并在梁分离器上进行干扰。离子 - 光子纠缠的单位保真度。
We demonstrate remote entanglement of trapped-ion qubits via a quantum-optical fiber link with fidelity and rate approaching those of local operations. Two ^{88}Sr^{+} qubits are entangled via the polarization degree of freedom of two spontaneously emitted 422 nm photons which are coupled by high-numerical-aperture lenses into single-mode optical fibers and interfere on a beam splitter. A novel geometry allows high-efficiency photon collection while maintaining unit fidelity for ion-photon entanglement. We generate heralded Bell pairs with fidelity 94% at an average rate 182 s^{-1} (success probability 2.18×10^{-4}).