QII-TAQS: Solid State Integration of Molecular Qubits

QII-TAQS：分子量子位的固态集成

• 批准号: 1936219
• 负责人: Ezekiel Johnston-Halperin
• 金额: $ 199.91万
• 依托单位: Ohio State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1936219&HistoricalAwards=false
• 关键词: QII; TAQS; Solid; State; Integration

Quantum information science has the potential to revolutionize entire sectors of our economy, from computation, to sensing, to communications. Exciting early steps along this path include: i) the demonstration of arrays of quantum bits, "qubits", that can perform computational tasks and are on the verge of demonstrating the ability to outperform classical computers, ii) the development of nanoscale quantum sensors that allow for measurement of everything ranging from electric and magnetic fields to single photons, and iii) the development of "flying qubits" (tiny packets of light that travel through fiber optic cables) that are already enabling the implementation of quantum encryption that is un-hackable using current technology. The promise, however, rests on the development of systems that exhibit the exact quantum properties necessary to make a good computer, sensor, etc. Chemists have been manipulating atomic states for centuries in the design and synthesis of new molecules - making molecules prime candidates for the design of customized qubits and quantum systems. Early experiments have shown that this approach has promise, but the challenge is to get these molecules out of the beaker (so to speak) and onto a chip so that they can be connected to other supporting technologies. This project focuses on studying candidate molecules in these device-like environments, with the goal of learning the "design rules" for molecular quantum systems and designing new approaches to initialize and measure (write and read) quantum information. This work will take place in a collaborative network involving university scientists in the US and abroad as well as close contact with industrial partners interested in building the "quantum infrastructure" that will be necessary to support the emergence of quantum information sciences. This interdisciplinary environment will provide unique training opportunities for undergraduates, graduate students, and postdoctoral researchers in the development of a quantum workforce. This project will develop a general framework for the integration of molecular spin-based qubits into solid state architectures, harnessing the ability to tune quantum states in molecular systems via synthetic control of ligand fields and electron-nuclear spin coupling to demonstrate a unique approach to generating qubits-by-design. Both electron and nuclear spin qubits have been demonstrated in molecular systems with appropriately engineered ligands. This performance is comparable to other leading qubit systems based on diamond NV centers, silicon donors, and Josephson junctions, and enables chemical tuning to tailor the coherence properties for particular applications. However, the field has thus far relied on measurements of large ensembles in solution, precluding the study of single-qubit properties and impeding scaling and integration with existing and emerging quantum technologies. Addressing this challenge requires an interdisciplinary program that exploits a framework of spin-dynamical theory and modeling to bridge from the synthesis of chemical qubits, to the validation of their quantum coherent properties, to the ultimate goal of quantum coherent device engineering. This project will explore how the requirements of quantum functionality intersect with the phase spaces accessible to molecular design and synthesis at one extreme and device design and fabrication at the other. As it matures, this framework will develop into a roadmap for the design of molecule-based quantum-functional devices that will be of broad relevance to the quantum information community and provide guidance as to how molecule-based quantum devices might be most effectively integrated into larger quantum-functional architectures. This project is jointly funded by Quantum Leap Big Idea Program, the Division of Chemistry in the Mathematical and Physical Sciences Directorate, and the Office of International Science and Engineering.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.

量子信息科学有可能彻底改变我们经济的整个部门，从计算到传感，再到通信。在这条道路上，令人兴奋的早期步骤沿着包括：i）量子比特（qubit）阵列的演示，“qubit”，其可以执行计算任务，并且即将演示优于经典计算机的能力，ii）纳米级量子传感器的开发，其允许测量从电场和磁场到单光子的一切，以及iii）“飞行量子比特”（通过光纤电缆传播的微小光包）的开发，这些量子比特已经能够实现使用当前技术无法破解的量子加密。然而，这一前景取决于开发出具有精确量子特性的系统，这些量子特性是制造良好计算机、传感器等所必需的。化学家们在设计和合成新分子方面已经操纵了几个世纪的原子状态，使分子成为定制量子比特和量子系统设计的主要候选者。早期的实验表明，这种方法是有希望的，但挑战是将这些分子从烧杯中取出（可以这么说）并放在芯片上，以便它们可以连接到其他支持技术。该项目的重点是在这些类似设备的环境中研究候选分子，目标是学习分子量子系统的“设计规则”，并设计新的方法来初始化和测量（写入和读取）量子信息。这项工作将在一个涉及美国和国外大学科学家的合作网络中进行，并与有兴趣建立“量子基础设施”的工业合作伙伴密切联系，这对支持量子信息科学的出现是必要的。这种跨学科的环境将为本科生，研究生和博士后研究人员提供独特的培训机会，以发展量子劳动力。该项目将开发一个通用框架，用于将基于分子自旋的量子位集成到固态架构中，利用通过配体场和电子-核自旋耦合的合成控制来调节分子系统中量子态的能力，以展示一种独特的方法来生成量子位通过设计。电子和核自旋量子比特都已在具有适当工程配体的分子系统中得到证实。这种性能与基于金刚石NV中心、硅施主和约瑟夫森结的其他领先量子位系统相当，并且能够进行化学调谐以针对特定应用定制相干特性。然而，到目前为止，该领域一直依赖于对溶液中大集合的测量，排除了对单量子比特特性的研究，并阻碍了与现有和新兴量子技术的扩展和集成。解决这一挑战需要一个跨学科的计划，利用自旋动力学理论和建模的框架，从化学量子位的合成，到量子相干特性的验证，再到量子相干器件工程的最终目标。该项目将探索量子功能的要求如何与分子设计和合成的相空间相交，另一方面是器件设计和制造。随着它的成熟，这个框架将发展成为基于分子的量子功能器件设计的路线图，这将与量子信息社区具有广泛的相关性，并为基于分子的量子器件如何最有效地集成到更大的量子功能架构中提供指导。该项目由Quantum Leap Big Idea Program、数学和物理科学理事会化学部以及国际科学与工程办公室共同资助。该奖项反映了NSF的法定使命，并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，被认为值得支持。

项目成果

Scalable Synthesis of Monolayer Hexagonal Boron Nitride on Graphene with Giant Bandgap Renormalization

利用巨带隙重正化在石墨烯上可规模化合成单层六方氮化硼

• DOI: 10.1002/adma.202201387
• 发表时间: 2022
• 期刊: Advanced Materials
• 影响因子: 29.4
• 作者: Wang, Ping;Lee, Woncheol;Corbett, Joseph P.;Koll, William H.;Vu, Nguyen M.;Laleyan, David Arto;Wen, Qiannan;Wu, Yuanpeng;Pandey, Ayush;Gim, Jiseok
• 通讯作者: Gim, Jiseok