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早已确立了革命性的前景，例如困难到几乎不可能的计算的指数级加速，它们可以通过原子和分子建模直接应用于解决一些社会面临的最大挑战，例如肥料生产的固氮、房间。人们已经认识到，需要数百万到数十亿的原始量子位来实现实用、通用和容错的量子计算，但目前还没有建立如此高度可扩展的范例。因此，大规模实现可扩展性和保持高相干性是量子信息处理的两个主要挑战，许多现有的量子系统（如超导量子位和俘获离子量子位）由于缺乏量子位而被逐个扩展。多路复用：必须制造更多的物理结构才能添加更多的量子位，因此，由于复合产率的强大，进一步增加量子位的数量是呈指数级的挑战。量子光学因其在光谱、时间和空间域中的光子复用能力而提供了一种有前途的替代方案，这意味着只需少量设备就可以在频率、时间或空间域中生成大量量子模式。为了达到下一步，量子集成技术必须成为现实，其中集成大量光子元件来处理大量量子模式。该提案旨在开发大规模多部分纠缠生成的方法，其中所有关键元件。 ， 包括纠缠生成和检测将集成在同一芯片上，这项工作可以在量子计算、网络和传感领域开辟新的途径。这项工作旨在开发利用集成技术生成大规模多部分纠缠态的方法。该方法基于高 Q 光学微谐振器，其中数百个频率由自由光谱范围分隔的经度光学模式将用作频率复用量子模式，通过连续变量方法对量子信息进行编码。微谐振器中的克尔参量过程和不同微谐振器之间的量子干涉将产生量子模式之间的无条件纠缠。为了实现“芯片上的量子实验”，具有高量子效率的平衡光电二极管将与纠缠发生芯片异构集成。将最大限度地减少量子态生成和检测之间的过量损耗和相位波动，以保持纠缠的质量。该项目不仅将在集成光子生成的多部分纠缠的规模和质量上实现巨大飞跃。电路，但更重要的是，这将是连续可变量子光学的小型化和适用性方面向前迈出的重要一步，并推动量子计算、通信和传感应用的最先进水平。该奖项反映了 NSF 的法定使命和通过使用基金会的智力价值和更广泛的影响审查标准进行评估，该项目被认为值得支持。

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: 2023-08
• 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