C-band single photons from a trapped ion via two-stage frequency conversion
C-band single photons from a trapped ion via two-stage frequency conversion
复制标题
DOI：
10.1063/5.0059966
复制
发表时间：
2021-03
影响因子：
4
通讯作者：
J. Hannegan;Uday Saha;J. Siverns;Jake Cassell;E. Waks;Q. Quraishi
中科院分区：
文献类型：
--
作者：
J. Hannegan;Uday Saha;J. Siverns;Jake Cassell;E. Waks;Q. Quraishi
基于光纤的量子网络需要电信波长的光子来连接长距离分离的量子比特。被捕获的离子是量子网络的主要候选者，具有高保真度的双量子比特门，长相干时间，以及容易发射与离子内部量子比特状态纠缠的光子的能力。然而，捕获的离子通常发射与电信光纤不兼容的波长的光子。在这里，我们展示了可见光光子的频率转换，从S-P偶极跃迁的被困的Ba+离子，到电信C波段发射。这些结果是实现长距离捕获离子量子互联网的重要一步。
Fiber-based quantum networks require photons at telecommunications wavelengths to interconnect qubits separated by long distances. Trapped ions are leading candidates for quantum networking with high-fidelity two-qubit gates, long coherence times, and the ability to readily emit photons entangled with the ion's internal qubit states. However, trapped ions typically emit photons at wavelengths incompatible with telecommunications fiber. Here, we demonstrate frequency conversion of visible photons, emitted from the S-P dipole transition of a trapped Ba+ ion, into the telecommunications C-band. These results are an important step towards enabling a long-distance trapped ion quantum internet.