Ion trap-integrated optical cavities for fast networked quantum computation

用于快速网络量子计算的离子阱集成光学腔

• 批准号: 2750094
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2750094
• 关键词: Ion; trap; integrated; optical; cavities

The QCS vision of quantum computing using distributed modular processors (networked 'nodes') depends upon the rapid production of remote entanglement between nodes. The current state-of-the-art rate is our NQIT result of 182 Hz [Phys. Rev. Lett. 124, 110501 (2020)]; any further performance increases will be modest and hard-won, due to the limited photon collection efficiency achievable via refractive optics. Meanwhile, a useful networked processor will require much higher remote entanglement rates. Critically, it will also need simpler and more reliable nodes, with a design amenable to large-scale fabrication and requiring minimal maintenance and calibration.It has long been recognised that optical cavities provide an elegant route to photon collection with near-unit efficiency. This presents the possibility of high-fidelity remote entangling operations at MHz rates, comparable to that of the fastest local two-qubit ion gates. However, experiments combining ion traps and cavities have historically struggled with a series of technical challenges. These have ranged from the difficulty of maintaining mirror alignment, to perturbations of the trapping potential due to the proximity of the dielectric mirror surfaces

使用分布式模块化处理器（网络“节点”）使用量子计算的QCS视觉取决于节点之间远程纠缠的快速产生。当前的最新速率是我们的NQIT结果182 Hz [Phys。莱特牧师。 124，110501（2020）];由于光子收集效率有限，可通过折射光学元件实现的有限，因此任何进一步的性能都将是适度的和硬击。同时，有用的网络处理器将需要更高的远程纠缠率。至关重要的是，它还需要更简单，更可靠的节点，并具有适合大规模制造的设计，并且需要最少的维护和校准。长期以来，人们已经认识到，光腔为具有近乎单位效率的光子收集提供了优雅的途径。这表明了以MHz速率与最快的局部双子离子门相当的高保真远程纠缠操作的可能性。但是，将离子陷阱和空腔结合在一起的实验在历史上一直在一系列技术挑战中挣扎。这些范围从保持镜像对齐的困难到由于介电镜面的接近而引起的捕获电位的扰动