CAREER: Integrated sources of multiphoton entanglement for enabling quantum interconnects

职业：用于实现量子互连的多光子纠缠集成源

• 批准号: 2339469
• 负责人: Ravitej Uppu
• 金额: $ 55万
• 依托单位: University of Iowa
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-08-01 至 2029-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2339469&HistoricalAwards=false
• 关键词: CAREER; Integrated; sources; multiphoton; entanglement

Nontechnical: In the quest to bring quantum technologies to the forefront, the challenge of scaling up quantum systems for practical applications looms large. Photons, serving as quantum interconnects, offer a solution by weaving together smaller quantum systems to enhance the overall quantum computational power, akin to classical cluster computers. However, the realization of practical photonic quantum interconnects hinges on the availability of entangled multiphoton sources with the required brightness, quality, and number of entangled particles. This project's core objective is to transform quantum light sources, specifically aiming to create efficient and high-quality multiphoton entangled states. The research leverages the advances made by the lead researchers in chip-scale single-photon sources that employ semiconductor quantum dots embedded in nanofabricated photonic structures to achieve robustness and scalability. To translate this performance of single-photon sources to multiphoton entanglement, innovations in material and device level modeling will be coupled with precise spectroscopy and qubit control to characterize and suppress noise in qubits. This comprehensive approach seeks to establish the practicality and resilience of photonic quantum interconnects in the near term. Complementing these scientific pursuits, the project places a strong emphasis on education, seeking to foster a robust science identity and a sense of belonging within the scientific community among students. Through an interdisciplinary forum and a quantum outreach program, the project aims to enhance the recruitment and retention of underrepresented communities in STEM by providing unique opportunities for student interaction and collaboration in the captivating field of quantum technologies.Technical: The central objective of this proposal is to design and implement an on-chip source of multiphoton entangled states that satisfy the steep demands on efficiency, fidelity, and scalability for realizing practical quantum interconnects. To achieve this, we will control and harness spin-photon interactions in optically active single quantum dots and tunnel-coupled quantum dots coupled to photonic crystal waveguides to achieve high collection efficiency, while leveraging low-noise properties of local-droplet etched quantum dots. Accomplishing the research tasks of this proposal will advance the understanding and lay the foundation for robust and efficient quantum interconnects by (1) establishing the fundamental limits on photon purity and entanglement fidelity through novel theoretical models and experiments, (2) addressing the knowledge gaps in the fundamental physics of spin-photon interactions in nanostructures, and (3) demonstrating 1D and 2D multiphoton entanglement generation in a chip-integrated quantum light source.This project is jointly funded by Electronic, Photonic, and Magnetic Devices (EPMD) Program of the Division of Electrical, Communications and Cyber Systems (ECCS) and the Established Program to Stimulate Competitive Research (EPSCoR).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.

非技术性：为了将量子技术带到最前沿，为实用应用扩展量子系统的挑战迫在眉睫。用作量子互连的光子通过将较小的量子系统编织在一起以增强总体量子计算功率，类似于经典群集计算机，提供了解决方案。然而，实现实用光子量子互连的实现呈现在纠缠多光源源具有所需的亮度，质量和纠缠粒子数量的可用性上。该项目的核心目标是改变量子光源，特别是为了创建高效且高质量的多人纠缠状态。这项研究利用了主要研究人员在芯片尺度单光子源中的进步，这些芯片量子源采用了嵌入纳米制动光子结构中的半导体量子点，以实现稳健性和可扩展性。为了将单光子源的这种性能转化为多光子纠缠，材料和设备级建模的创新将与精确的光谱和Qubit Controls结合起来，以表征和抑制Quine的噪声。这种全面的方法旨在在短期内建立光子量子互连的实用性和弹性。该项目与这些科学的追求相辅相成，非常重视教育，试图促进学生在科学界内部的科学认同感和学生之间的归属感。通过一个跨学科论坛和量子宣传计划，该项目旨在通过为Stem中代表性不足的社区提供招聘和保留，通过为学生的互动和吸引人的协作提供独特的机会，以设计和实施较高的范围，以使型号的范围内的范围际交往能力，以达到量子技术的吸引人。实现实用的量子互连。为了实现这一目标，我们将在光学活跃的单个量子点和隧道偶联的量子点中控制和线束自旋光子相互作用，并耦合到光子晶体波导，以达到高收集效率，同时利用局部吸管量子蚀刻点的低含量性能。完成该提案的研究任务将通过（1）通过（1）通过新的理论模型和实验来建立对光子纯度和纠缠忠诚度的基本限制来提高理解并为稳健有效的量子互连，（2）解决nanos结构中的基本相互作用和（3）的知识差距（2）（2） CHIP集成的量子光源。本项目由电气，光子和磁性设备（EPMD）计划共同资助。电气，通信和网络系统（ECC）（ECCS）和既定计划的计划（EPSCOR）（EPSCOR）的既定计划（EPSCOR）。这项奖项反映了NSF的法定任务，并反映了通过评估的范围构成的构成者的范围，并具有范围的范围。