Photonic graph state generation from quantum dots and color centers for quantum communications
Photonic graph state generation from quantum dots and color centers for quantum communications
复制标题
DOI：
10.1103/physrevb.98.085303
复制
发表时间：
2018-01
影响因子：
3.7
通讯作者：
A. Russo;Edwin Barnes;S. Economou
中科院分区：
文献类型：
--
作者：
A. Russo;Edwin Barnes;S. Economou
光子的高度纠缠图态在通用量子计算和量子通信中具有应用。在后一种情况下，它们被认为是建立跨量子中继器网络的长距离纠缠的关键要素。最近给出了一种从量子发射器生成中继器图状态的通用确定性方法，但缺乏实际系统的详细协议。在这里，我们提供了从两种类型的量子发射器、金刚石中的 NV 中心和自组装量子点生成中继器图状态的显式协议。我们设计的一个关键要素是发射极和辅助装置之间的新型高效 CZ 栅极。我们的方案与目前的实验能力是一致的。
Highly entangled graph states of photons have applications in universal quantum computing and in quantum communications. In the latter context, they have been proposed as the key ingredient in the establishment of long-distance entanglement across quantum repeater networks. Recently a general deterministic approach to generate repeater graph states from quantum emitters was given, but detailed protocols for real systems is lacking. Here, we provide explicit protocols for the generation of repeater graph states from two types of quantum emitters, NV centers in diamond and self-assembled quantum dots. A crucial element of our designs is a novel efficient CZ gate between the emitter and an ancilla. Our scheme is consistent with current experimental capabilities.