CAREER: Generation and detection of large-scale quantum entanglement on an integrated photonic chip

职业：在集成光子芯片上生成和检测大规模量子纠缠

• 批准号: 2238096
• 负责人: Xu Yi
• 金额: $ 55万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-02-15 至 2028-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2238096&HistoricalAwards=false
• 关键词: CAREER; Generation; detection; large; scale

Quantum information and quantum computing have long established revolutionary promises, such as exponential speedup of difficult to near-impossible computations. They can be directly applied to attack some of society’s biggest challenges through modeling atoms and molecules, such as nitrogen fixation for fertilizer production, room-temperature superconductivity, and pharmaceuticals. It has been recognized that millions to billions of raw qubits are required to realize practical, universal, and fault-tolerant quantum computing. Yet there exists no established paradigm for building such highly scalable quantum systems. Therefore, achieving scalability and maintaining high coherence at a large scale are two of the central challenges to quantum information processing. Many existing quantum systems, like superconducting qubits and trapped ion qubits, are scaled up qubit by qubit due to the lack of multiplexing: one has to fabricate N more physical structures to add N more qubits. Thus, to further increase the number of qubits is exponentially challenging because of the power of the compound yield rate. Quantum optics provides a promising alternative thanks to its capability of photonic multiplexing in spectral, temporal, and spatial domains, meaning that a large number of quantum modes in frequency, time, or spatial domain can be generated with just a few devices. In order to reach the next step, quantum-integrated technology must become a reality, where a massive number of photonic elements are integrated to process the large number of quantum modes. This proposal aims to develop methods for large-scale multipartite entanglement generation, where all critical elements, including entanglement generation and detection, will be integrated on the same chip. The proposed work can open up new avenues in the fields of quantum computing, networking, and sensing.The proposed effort aims to develop methods to generate large-scale multipartite entanglement states with integrated photonic circuits. The approach is based on high-Q optical microresonators, where hundreds of longitude optical modes with their frequencies separated by free-spectral-range will serve as frequency multiplexed quantum modes to encode quantum information through the continuous-variable approach. Unconditional entanglement among the quantum modes will be created by the Kerr parametric process in microresonators and quantum interference among different microresonators. To pursue “quantum experiment on a chip,” balanced photodiodes with high quantum efficiency will be heterogeneously integrated with the entanglement generation chip, which will minimize excess loss and phase fluctuation between quantum state generation and detection to preserve the quality of entanglement. This project will not only create a quantum leap in the scale and quality of multipartite entanglement generated with integrated photonic circuits, but more importantly, it will be a significant step forward in the miniaturization and applicability of continuous-variable quantum optics and push the state-of-art for applications in quantum computing, communication, and sensing.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.

量子信息和量子计算长期以来已经建立了革命性的承诺，例如难以实现近乎不可能的计算的指数加速。可以通过建模原子和分子（例如用于肥料生产，室温超导性和药品的氮固定剂）直接应用它们来攻击一些社会最大的挑战。人们已经认识到，实现实用，通用和容忍故障的量子计算需要数百万到数十亿的原始数量。然而，没有建立这种高度可扩展的量子系统的确定范式。因此，实现可伸缩性并在大规模上保持较高的连贯性是量子信息处理的两个核心挑战。许多现有的量子系统，例如超导码头和被困的离子量子箱，由于缺乏多重速度而被量子尺度缩放：一个人必须制造更多的物理结构才能添加n个更多的量子。这进一步增加了量子位的数量，由于复合收益率的功率，要质质挑战。量子光学器件提供了一种有望的替代方法，归功于它在光谱，临时和空间域中光子多路复用的能力，这意味着只需使用几个设备就可以生成大量频率，时间或空间域的量子模式。为了达到下一步，量子集成技术必须成为现实，其中大量的光子元素被整合以处理大量的量子模式。该提案旨在开发大型多部分纠缠产生的方法，其中所有关键要素（包括纠缠产生和检测）都将集成在同一芯片上。拟议的工作可以在量子计算，网络和敏感性领域开放新的途径。拟议的工作旨在开发使用具有集成光子电路的大规模多部分纠缠状态的方法。该方法基于高Q光学微孔子，其中数百种经过自由光谱范围频率的经度光学模式将用作频率多路复用量子模式，以通过连续变量的方法编码量子信息。量子模式之间的无条件纠缠将由微孔子中的Kerr参数过程和不同微孔子之间的量子干扰产生。要购买“芯片上的量子实验”，具有高量子效率的平衡光二极管将与纠缠产生芯片异质整合在一起，这将最大程度地降低超过损失，并在量子状态的产生和检测之间波动以保持纠缠质量。该项目不仅将在由集成光子电路产生的多部分纠缠的规模和质量上产生量子飞跃，而且更重要的是，这将是连续可变量子光学的小型化和可应用性的重要一步智力优点和更广泛的影响审查标准。

项目成果

Generation of squeezed quantum microcombs with silicon nitride integrated photonic circuits

利用氮化硅集成光子电路生成挤压量子微梳

• DOI: 10.1364/optica.498670
• 发表时间: 2023
• 期刊: Optica
• 影响因子: 10.4
• 作者: Jahanbozorgi, Mandana;Yang, Zijiao;Sun, Shuman;Chen, Haoran;Liu, Ruxuan;Wang, Beichen;Yi, Xu
• 通讯作者: Yi, Xu