A quantum memory intrinsic to single nitrogen-vacancy centres in diamond
A quantum memory intrinsic to single nitrogen-vacancy centres in diamond
复制标题
DOI：
10.1038/nphys2026
复制
发表时间：
2011-10-01
期刊：
影响因子：
19.6
通讯作者：
Awschalom, D. D.
中科院分区：
文献类型：
--
作者：
Fuchs, G. D.;Burkard, G.;Awschalom, D. D.
量子存储器由一个长寿命的量子比特组成，每个处理量子比特连接一个量子比特，对于构建一个可扩展的量子信息科学平台非常重要。这两个量子比特应该通过快速和高保真的操作连接起来，以存储和检索相干量子态。在这里，我们展示了一种基于钻石中每个氮空位(NV)中心固有的氮核自旋的室温量子记忆。我们使用Landau-Zener跃迁跨越超精细介导的避免能级交叉，在单个氮核自旋中实现了单个NV中心电子自旋的相干存储。通过工作在渐近区域之外，我们展示了短短120 ns的相干态转移，总存储保真度为88+/-6%。这项工作演示了与缩放兼容的量子存储器的使用，因为氮核确实存在于每个NV中心缺陷中。
A quantum memory, composed of a long-lived qubit coupled to each processing qubit, is important to building a scalable platform for quantum information science. These two qubits should be connected by a fast and high-fidelity operation to store and retrieve coherent quantum states. Here, we demonstrate a room-temperature quantum memory based on the spin of the nitrogen nucleus intrinsic to each nitrogen-vacancy (NV) centre in diamond. We perform coherent storage of a single NV centre electronic spin in a single nitrogen nuclear spin using Landau-Zener transitions across a hyperfine-mediated avoided level crossing. By working outside the asymptotic regime, we demonstrate coherent state transfer in as little as 120 ns with total storage fidelity of 88 +/- 6%. This work demonstrates the use of a quantum memory that is compatible with scaling as the nitrogen nucleus is deterministically present in each NV centre defect.