QuIC-TAQS: Deterministically Placed Nuclear Spin Quantum Memories for Entanglement Distribution

QuIC-TAQS：用于纠缠分布的确定性放置的核自旋量子存储器

• 批准号: 2137828
• 负责人: Christopher Hinkle
• 金额: $ 250万
• 依托单位: University of Notre Dame
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2137828&HistoricalAwards=false
• 关键词: QuIC; TAQS; Deterministically; Placed; Nuclear

Connecting nodes of a communication network with quantum states would fundamentally change the way we communicate, process information, and sense the world around us. Unfortunately, realizing such connections over long distances has been hampered by the lack of quantum interconnects that can transfer, store, and manipulate delicate quantum states. This project aims to demonstrate a quantum repeater with precisely placed quantum memory to enable large-scale quantum networks. The PIs will accomplish this using ultra-pure semiconductor materials coupled with novel atomic-scale fabrication techniques capable of creating quantum devices with atomic precision. The devices will be integrated into photonic platforms and protocols for their use and system-level integration will be developed. The regularity and quality of the qubits synthesized through these techniques will enable large-scale quantum interconnects. The PIs will also develop new multi-disciplinary undergraduate curricula to train students in quantum information science and recruit students from underrepresented groups into the program and research. Ensuring quantum concepts are introduced during the first year of study coupled with hands-on undergraduate research will help train the future workforce in quantum information sciences. This research aims to demonstrate a quantum repeater using the silicon monovacancy at a hexagonal Si site (the V1 center) in isotopically purified SiC. The goals of this research include: (1) create deterministically-placed V1 centers in ultra-low defect, isotopically-pure 28Si12C grown epitaxially; (2) create nearby deterministically-placed 29Si or 13C nuclear isotopes as quantum memories using atomically precise fabrication techniques using a scanning tunneling microscope; (3) exploit the precise placement of the nuclear spin to enable superior quantum memories and control schemes for transferring quantum information to and from the memory and distant nodes; (4) integrate the optically-addressable defects and quantum memories into nanophotonic structures, providing a nanophotonic interface and aiding integration in scalable quantum networks; and (5) develop and implement optimized routing, entanglement, and measurement protocols for the demonstrated repeater in a quantum internet, incorporating realistic device performance such as gate errors, channel loss, and memory lifetimes. The results of this project will enable the fabrication of quantum repeaters on the timescale of days compared to the year that current approaches require. Additionally, the utility of this approach is not limited to developing quantum repeaters, and could enable superior defect-based quantum processors, quantum sub-systems, and quantum sensors.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

将通信网络的节点与量子态连接将从根本上改变我们通信、处理信息和感知周围世界的方式。 不幸的是，由于缺乏可以传输、存储和操纵微妙量子态的量子互连，实现这种长距离连接受到了阻碍。 该项目旨在演示具有精确放置的量子存储器的量子中继器，以实现大规模量子网络。 PI 将使用超纯半导体材料以及能够创建具有原子精度的量子器件的新型原子级制造技术来实现这一目标。 这些设备将集成到光子平台和协议中以供其使用，并将开发系统级集成。 通过这些技术合成的量子位的规律性和质量将使大规模量子互连成为可能。 PI 还将开发新的多学科本科课程，以培训量子信息科学的学生，并招收代表性不足群体的学生加入该项目和研究。确保在第一年的学习中引入量子概念，再加上本科生的实践研究，将有助于培训量子信息科学领域的未来劳动力。本研究旨在展示一种使用同位素纯化 SiC 中六方 Si 位点（V1 中心）处的硅单空位的量子中继器。 这项研究的目标包括：(1) 在外延生长的超低缺陷、同位素纯 28Si12C 中创建确定性放置的 V1 中心； (2) 使用扫描隧道显微镜，使用原子精确制造技术，创建附近确定性放置的 29Si 或 13C 核同位素作为量子存储器； （3）利用核自旋的精确位置来实现卓越的量子存储器和控制方案，以将量子信息传输到存储器和远程节点或从存储器和远程节点传输量子信息； （4）将光学可寻址缺陷和量子存储器集成到纳米光子结构中，提供纳米光子接口并帮助集成到可扩展的量子网络中； (5) 为量子互联网中演示的中继器开发和实施优化的路由、纠缠和测量协议，结合现实的设备性能，如门错误、通道损耗和存储器寿命。 该项目的结果将使量子中继器的制造在几天的时间内完成，而当前方法所需的时间则需要一年。 此外，这种方法的用途不仅限于开发量子中继器，还可以实现基于缺陷的卓越量子处理器、量子子系统和量子传感器。该奖项反映了 NSF 的法定使命，并通过使用评估被认为值得支持基金会的智力价值和更广泛的影响审查标准。