EFRI ACQUIRE: Deterministic photonic graph-state repeater networks from solid state emitters integrated in chiral photonic circuits

该计划将开发新的组件，并将它们集成到一个设备中，该设备将作为基于量子力学原理的具有先进功能的安全通信网络的关键构建模块。它将解决在长距离范围内安全通信的迫切需要，同时使用新的理论方案，使用最少的资源。该方法基于能够以高速率产生许多量子相关（纠缠）光子的新的高质量光源的开发;这些光源将被集成到能够将光子引导到微芯片上并可靠地将其引导到光纤进行长距离传输的设备中。纠缠光子编码的信息在发送者或接收者没有意识到这一点的情况下无法被拦截。这种能力将极大地影响社会和国家安全，并有助于保持美国在信息和通信技术方面的领导地位。除了通信之外，开发的组件和专有技术将影响目前正在追求的其他具有高度影响力的量子技术，包括量子计算。除了基础科学、技术和工程开发外，PI还致力于招募和培训下一代科学家和工程师，通过K-12学习活动和暑期课程强调多样性和跨学科教育。该计划将量子通信的新思想与尖端固态量子技术相结合，以实现用于实现量子通信网络的芯片集成器件。变革性的量子中继器技术将在多光子纠缠态的基础上发展。主要组成部分包括：（i）存在于二维材料中的新型发射体，其提供具有对于自旋-光子和多光子纠缠理想的能级结构的高产率单光子发射，（ii）金刚石中的缺陷中心，其提供自旋-光子界面、室温能力和长寿命核自旋量子存储器，（iii）用于有效光子提取和片上自旋-自旋纠缠的手征波导，以及（iv）新颖量子通信实现的理论设计，包括使用最少资源的全光子量子中继器的确定性生成。这些组件将集成在一起，形成量子光子电路，为通信提供重要的新功能。对拟议目标的追求将导致广泛量子通信技术的关键设备组件的进步，并为不久的将来实现长距离安全量子通信提供一条道路。

This program will develop novel components and integrate them into a device that will serve as the key building block of a secure communication network with advanced capabilities based on the principles of quantum mechanics. It will address the pressing need for secure communication at long distance scales while employing minimal resources using novel theoretical schemes. The approach is based on the development of new, high-quality light sources capable of producing many quantum-correlated (entangled) photons at a high rate; these light sources will be integrated into a device that is capable of directing the photons on a microchip and reliably guiding them to optical fibers for long-distance transmission. The entangled photons encode information that cannot be intercepted without the sender or receiver becoming aware of this. Such a capability will greatly impact society and national security and help maintain U.S. leadership in information and communication technologies. Beyond communications, the developed components and know-how will impact other highly influential quantum technologies currently being pursued, including quantum computing. In addition to fundamental science, technology and engineering developments, the PIs are committed to recruiting and training the next generation of scientists and engineers, with an emphasis on diversity and interdisciplinary education through K-12 learning activities and summer programs.This program combines novel ideas in quantum communications with cutting edge solid-state quantum technologies to achieve on-chip integrated devices for the realization of a quantum communication network. Transformative quantum repeater technologies will be developed based on multiphoton entangled states. Central components include: (i) novel emitters hosted in two-dimensional materials, which provide high-yield single-photon emission with a level structure ideal for spin-photon and multiphoton entanglement, (ii) defect centers in diamond that offer spin-photon interfaces, room-temperature capability and a long-lived nuclear spin quantum memory, (iii) chiral waveguides for efficient photon extraction and spin-spin entanglement on-chip, and (iv) theoretical designs for novel quantum communication implementations, including the deterministic generation of all-photonic quantum repeaters using minimal resources. These components will be integrated together to form quantum photonic circuits that offer significant novel capabilities in communications. The pursuit of the proposed goals will lead to advances in key device components for a broad range of quantum communication technologies as well as offer a path to the near-future realization of secure quantum communication at long distance scales.