An integrated photonic device in diamond to generate quantum entanglement, a computational resource for quantum information processing

金刚石中的集成光子器件可产生量子纠缠，这是一种用于量子信息处理的计算资源

• 批准号: 1506473
• 负责人: Kai-Mei Fu
• 金额: $ 35万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-15 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1506473&HistoricalAwards=false
• 关键词: integrated; photonic; device; diamond; generate

Abstract title: An integrated photonic device in diamond to generate quantum entanglement, a computational resource for quantum information processingAbstract:Nontechnial description:This project seeks to demonstrate a quantum device that is an essential building block in a quantum computing network. The device will generate entanglement, a computational resource, between two electron spins in diamond. The main challenge for generating entanglement between spins is performing the operation quickly compared to the entanglement lifetime. Prior experiments in diamond which utilized free-space optical components realized generation rates in the 10-100 millihertz regime. Here we seek to utilize integrated photonics to realize kilohertz rates. The materials platform contains an optical waveguiding layer built in the semiconductor gallium phosphide. This waveguiding layer connects quantum nodes composed of nitrogen-vacancy centers in diamond. A third detetor layer, made from the superconducting material niobium nitride, is used to detect the photons emitted from the nitrogen-vacancy centers. Kilohertz entanglement rates in a scalable platform will enable the realization of large quantum networks. These networks can be utilized to solve computational problems which cannot be solved on a classical computer. Graduate and undergraduates involved in the research will be trained in the design, fabrication, and testing of cutting edge photonic and quantum device technologies. Additionally, a mobile, hands-on demonstration table, which presents fundamental concepts of materials science through diamond-based activities, will be developed and employed at the University of Washington and Seattle-wide science outreach events.Technical description:Atomic-like solid-state defects are attractive candidates for scalable quantum information processing due to the potential to integrate these defects into devices. However, the challenges associated with tuning the individual quantum properties of these defects, as well as the difficulty in controlling interactions between defects, has thus far prohibited the realization of a scalable defect-based quantum network. This works seeks to demonstrate a quantum device, an on-chip entanglement generation unit, that is expected to serve as an essential building block for such a network. A novel, hybrid photonic structure will be utilized that integrates gallium phosphide as an optical device layer with a diamond substrate which hosts the nitrogen-vacancy quantum information nodes. The device utilizes photon interference to generate entanglement, which requires control of the optical properties of individual nitrogen-vacancy centers. This control is provided by integrated electrodes compatible with the gallium phosphide layer. The gallium phosphide device layer enables efficient collection and routing of nitrogen-vacancy photons to waveguide-integrated superconducting detectors to achieve kilohertz electron entanglement rates.

摘要标题：钻石中的一种集成的光子设备，用于生成量子纠缠，这是一种用于量子信息处理的计算资源：非技术描述：本项目旨在演示量子设备，该设备是量子计算网络中必不可少的构建块。该设备将在钻石中两个电子旋转之间产生纠缠，一种计算资源。与纠缠寿命相比，旋转之间产生纠缠的主要挑战是迅速执行操作。在10-100 millihertz制度中，利用自由空间光学成分实现的钻石实验。 在这里，我们试图利用集成的光子学来实现kilohertz率。该材料平台包含一个内置在半导体磷化物中的光学波形层。这个波导层连接由钻石中的氮 - 呈中心组成的量子节点。由氮化物超导材料氮化物制成的第三层层用于检测从氮呈现中心发出的光子。 可扩展平台中的Kilohertz纠缠率将实现大量子网络。这些网络可用于解决无法在古典计算机上解决的计算问题。参与研究的研究生和本科生将在尖端光子和量子设备技术的设计，制造和测试中进行培训。此外，将在华盛顿大学和西班牙大学范围内的科学外展活动中开发和使用一张移动动手示范表，该表通过基于钻石的活动提出了材料科学的基本概念。技术描述：由于潜在的将这些缺陷集成到设备中，因此，原子状的固态缺陷是可缩放的量子信息处理的有吸引力的候选物。但是，与调整这些缺陷的各个量子特性以及控制缺陷之间相互作用的困难相关的挑战已禁止实现基于可伸缩缺陷的量子网络。 这项工作旨在演示量子设备，即芯片纠缠生成单元，预计将作为此类网络的必不可少的构建块。将利用一种新型的杂化光子结构将磷化镀锌物作为光学设备层与钻石底物集成，该钻石底物含有氮 - 胶囊量子信息节点。该设备利用光子干扰来产生纠缠，这需要控制单个氮呈中心的光学性质。该控制是由与磷化镀皮层兼容的集成电极提供的。磷化物装置层可以有效地收集和将氮的光子光子聚集到波导集成的超导检测器，以实现Kilohertz电子纠缠率。