Collaborative research: Quantum Communication with Loss-Protected Photonic Encoding

合作研究：采用防丢失光子编码的量子通信

• 批准号: 1933556
• 负责人: Dirk Englund
• 金额: $ 26.25万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-15 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1933556&HistoricalAwards=false
• 关键词: Collaborative; research; Quantum; Communication; Loss

Nontechnical Description: Quantum photonic processors generate, process, and measure quantum states of light on-chip to provide exponential advantages in computation, simulation, and communication. But such processors are also very sensitive to noise and loss. To realize practical quantum photonic processors that can solve useful problems requires quantum error correction which, like classical error correction, incorporates redundancy in order to protect the information from faults in the system. But the realization of these error correcting codes with photons is extremely challenging and requires very efficient photon sources, mode transformations, and single photon nonlinearities. Recent progress in integrated photonics and quantum optics has provided these core individual components, but integrating them into complex fault-tolerant systems remains extremely challenging. This program aims to combine large-scale silicon photonics, quantum emitters, and strongly nonlinear materials to build next generation quantum photonics processors that can protect quantum information using error correction. To address this challenging goal, the principal investigators will combine state-of-the-art quantum dot sources and nonlinearities with foundry based silicon photonics, a scalable and CMOS-compatible photonic platform. New fabrication approaches will be developed to combine these disparate components into a single device structure that can manipulate and interact photons with each other at an unprecedented scale. These devices will operate at the technologically important telecommunications band, and could potentially interfaced with existing infrastructure to develop continental-scale unconditionally secure communication networks. They could also implement next generation quantum algorithms advancing drug design, materials science and big data -- all at a scale where classical machines can no longer keep pace. This program will also contain a significant outreach effort aimed at developing the next generation of quantum engineers by mentoring, new curriculum development, and the development of a youtube channel for quantum engineering. Technical Description: A key goal of this program is a unification of the core individual hardware components into a single system that can efficiently process quantum states of light on a semiconductor chip. These core components include single photon sources, high-fidelity mode transformations, and strong single-photon nonlinearities. By bringing together a combination of complementary expertise in large-scale silicon photonics design, quantum emitter spectroscopy, and nano-fabrication of CMOS control, this proposal will develop systems level solutions to build next generation quantum photonics processors that can perform photonic quantum error correction, the key ingredient for scalable quantum information processing. To generate single photons, the team will utilize high-efficiency single photon sources based on InAs quantum dots. Large-scale Si photonic circuits will apply complex linear mode transformations on generated photons. Finally, cavity-coupled quantum dots in the strong coupling regime will implement single photon nonlinearities to generate two-qubit interactions. Hybrid fabrication techniques will be leveraged to combine different material platforms into a single circuit that can implement photonic error correction for loss, the dominant fault mechanism for photonic qubits. Such loss error correction codes are essential for any scalable quantum information processing application including photonic quantum computers and one-way quantum repeaters that can attain long distance and high speeds simultaneously.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.

非技术描述：量子光子处理器生成，过程和测量片上光线的量子状态，以在计算，仿真和通信方面具有指数优势。但是，这样的处理器也对噪声和损失非常敏感。要实现可以解决有用问题的实用量子光子处理器，需要量子误差校正，就像经典的误差校正一样，它结合了冗余，以保护信息免受系统故障的影响。但是，使用光子纠正这些误差代码的实现极具挑战性，需要非常有效的光子源，模式转换和单个光子非线性。集成光子学和量子光学的最新进展提供了这些核心个体组件，但是将它们集成到复杂的耐断层系统中仍然极具挑战性。该程序旨在结合大规模硅光子学，量子发射器和强烈的非线性材料，以构建可以使用误差校正来保护量子信息的下一代量子光子处理器。为了解决这个具有挑战性的目标，首席研究人员将将最先进的量子点源和非线性与基于铸造的硅光子学结合在一起，这是一种可扩展且与CMOS兼容的光子平台。将开发新的制造方法，以将这些不同的组件组合到单个设备结构中，该结构可以以前所未有的规模操纵和相互作用的光子。这些设备将在技术上重要的电信频带上运行，并有可能与现有的基础架构连接以开发大陆规模无条件安全的通信网络。他们还可以实施下一代量子算法，推进药物设计，材料科学和大数据 - 所有这些都无法再保持节奏。该计划还将包含旨在通过指导，新课程开发以及开发Quantum工程渠道来开发下一代量子工程师的大量宣传工作。技术描述：该程序的一个关键目标是将核心个体硬件组件统一到单个系统中，该系统可以有效地处理半导体芯片上的量子状态。这些核心组件包括单个光子源，高保真模式转换和强大的单光子非线性。通过将大规模硅光子学设计，量子发射器光谱和CMOS控制的纳米制作的互补专业知识汇总在一起，该提案将开发系统级别的解决方案，以构建下一代量子光子处理器，这些解决方案可以构建可以执行光子量子误差的关键量子量子误差，这是可缩放量子量子信息处理的关键成分。为了生成单个光子，该团队将基于INAS量子点利用高效率单光子源。大规模的SI光子电路将在生成的光子上应用复杂的线性模式转换。最后，强耦合方案中的腔耦合量子点将实现单个光子非线性以产生两量相互作用。将利用混合制造技术将不同的材料平台组合到单个电路中，该电路可以实施光子误差损失，这是光子Qubits的主要断层机制。此类损失误差校正代码对于任何可扩展的量子信息处理应用程序至关重要，包括光子量子计算机和单向量子中继器，可以同时实现远距离和高速。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识和更广泛影响的评估来通过评估来获得支持的。

项目成果

Universal linear optics by programmable multimode interference

通过可编程多模干涉实现通用线性光学

• DOI: 10.1364/oe.439341
• 发表时间: 2021
• 期刊: Optics Express
• 影响因子: 3.8
• 作者: Larocque, Hugo;Englund, Dirk
• 通讯作者: Englund, Dirk