Developing silicon carbide for quantum spintronics
Developing silicon carbide for quantum spintronics
复制标题
DOI：
10.1063/5.0004454
复制
发表时间：
2020-05-11
影响因子：
4
通讯作者：
Awschalom, David D.
中科院分区：
文献类型：
--
作者：
Son, Nguyen T.;Anderson, Christopher P.;Awschalom, David D.
在目前的长距离通信中，大量粒子携带的经典信息本质上对某些传输损耗具有鲁棒性，但因此可以在没有通知的情况下被窃听。另一方面，量子通信可以提供可证明的隐私，并可以通过量子中继器利用纠缠交换来减轻传输损耗。为此，在过去的几十年里，人们花费了相当大的努力来开发量子中继器，它将长寿命的量子存储器与不可区分的单光子源相结合。已经开发了多个固态的候选光学自旋量子比特，包括量子点、稀土离子以及金刚石和碳化硅（SiC）中的色心。从这个角度来看，我们简要概述了在SiC中开发光学活性自旋量子比特的最新进展，并讨论了量子中继器应用中的挑战和可能的解决方案。结合不同材料平台的发展，讨论了SiC自旋量子比特在可扩展量子网络中的应用前景。
In current long-distance communications, classical information carried by large numbers of particles is intrinsically robust to some transmission losses but can, therefore, be eavesdropped without notice. On the other hand, quantum communications can provide provable privacy and could make use of entanglement swapping via quantum repeaters to mitigate transmission losses. To this end, considerable effort has been spent over the last few decades toward developing quantum repeaters that combine long-lived quantum memories with a source of indistinguishable single photons. Multiple candidate optical spin qubits in the solid state, including quantum dots, rare-earth ions, and color centers in diamond and silicon carbide (SiC), have been developed. In this perspective, we give a brief overview on recent advances in developing optically active spin qubits in SiC and discuss challenges in applications for quantum repeaters and possible solutions. In view of the development of different material platforms, the perspective of SiC spin qubits in scalable quantum networks is discussed.