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，该设备将作为具有基于量子力学原理的先进能力的安全通信网络的关键构建块。它将解决长距离安全通信的迫切需求，同时使用新的理论方案使用最少的资源。这种方法的基础是开发能够高速产生许多量子关联(纠缠)光子的新的高质量光源；这些光源将被集成到一种设备中，能够引导微芯片上的光子并可靠地将其引导到光纤上进行远距离传输。纠缠的光子编码了在发送者或接收者没有意识到这一点的情况下无法截获的信息。这样的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，开发的组件和技术诀窍将影响目前正在追求的其他极具影响力的量子技术，包括量子计算。除了基础科学、技术和工程的发展，私人投资机构致力于招募和培训下一代科学家和工程师，重点是通过K-12学习活动和暑期项目进行多样性和跨学科教育。该计划将量子通信方面的新想法与尖端固态量子技术相结合，实现用于实现量子通信网络的片上集成器件。基于多光子纠缠态的变革性量子中继器技术将被开发出来。主要组件包括：(I)以二维材料为主体的新型发射器，它提供了高产量的单光子发射，具有非常适合于自旋光子和多光子纠缠的能级结构；(Ii)钻石中的缺陷中心，提供了自旋光子界面、室温能力和长寿命的核自旋量子存储器；(Iii)用于高效提取光子和片内自旋纠缠的手性光波导；以及(Iv)用于新型量子通信实现的理论设计，包括使用最少的资源确定性地生成全光子量子中继器。这些组件将被集成在一起，形成量子光子电路，在通信中提供重要的新功能。对拟议目标的追求将导致广泛量子通信技术的关键设备部件的进步，并提供一条在不久的将来实现远距离安全量子通信的途径。

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.