Nemoto Kae, Trupke Michael, Devitt Simon J, Scharfenberger Burkhard, Buczak Kathrin, Schmiedmayer Jörg, Munro William J
National Institute of Informatics, 2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo 101-8430, Japan.
Vienna Center for Quantum Science and Technology, Atominstitut, TU Wien, 1020 Vienna, Austria.
Sci Rep. 2016 May 24;6:26284. doi: 10.1038/srep26284.
In this article we present a simple repeater scheme based on the negatively-charged nitrogen vacancy centre in diamond. Each repeater node is built from modules comprising an optical cavity containing a single NV(-), with one nuclear spin from (15)N as quantum memory. The module uses only deterministic processes and interactions to achieve high fidelity operations (>99%), and modules are connected by optical fiber. In the repeater node architecture, the processes between modules by photons can be in principle deterministic, however current limitations on optical components lead the processes to be probabilistic but heralded. Our resource-modest repeater architecture contains two modules at each node, and the repeater nodes are then connected by entangled photon pairs. We discuss the performance of such a quantum repeater network with modest resources and then incorporate more resource-intense strategies step by step. Our architecture should allow large-scale quantum information networks with existing or near future technology.
在本文中，我们提出了一种基于金刚石中带负电荷的氮空位中心的简单中继器方案。每个中继器节点由包含单个NV(-)的光学腔模块构建而成，其中一个来自(15)N的核自旋作为量子存储器。该模块仅使用确定性过程和相互作用来实现高保真操作（>99%），并且模块通过光纤连接。在中继器节点架构中，光子在模块之间的过程原则上可以是确定性的，然而目前光学组件的限制导致这些过程是概率性的但有预示。我们资源适度的中继器架构在每个节点包含两个模块，然后中继器节点通过纠缠光子对连接。我们讨论了这种资源适度的量子中继器网络的性能，然后逐步纳入资源强度更高的策略。我们的架构应该能够利用现有或近期未来的技术实现大规模量子信息网络。
