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”）的量子计算的 QCS 愿景取决于节点之间远程纠缠的快速产生。当前最先进的速率是我们的 NQIT 结果 182 Hz [Phys.莱特牧师。 124, 110501(2020)];由于通过折射光学器件可实现的光子收集效率有限，任何进一步的性能提升都将是有限且来之不易的。同时，一个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，其设计适合大规模制造，并且需要最少的维护和校准。人们早就认识到，光学腔提供了一种优雅的光子收集途径，具有接近单位的效率。这提供了以 MHz 速率进行高保真远程纠缠操作的可能性，与最快的本地两量子位离子门相当。然而，结合离子阱和腔体的实验历来都面临着一系列技术挑战。这些问题的范围从维持反射镜对准的困难到由于电介质反射镜表面的接近而导致的俘获电势的扰动