Towards Spin-based Quantum Computing in the Solid State: Tomography of a Spin Node

迈向固态中基于自旋的量子计算：自旋节点的断层扫描

• 批准号: 1314205
• 负责人: Carlos Meriles
• 金额: $ 38.12万
• 依托单位: CUNY City College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1314205&HistoricalAwards=false
• 关键词: Towards; Spin; based; Quantum; Computing

Harnessing the quantum behavior of nanoscopic physical systems is at the center of a broad cross-disciplinary effort driven by the promise of various applications for information processing and secure communication. The prospect of performance gains and increased complexity is driving interest in new devices for existing or new functions (particularly, quantum information processing (QIP) protocols) as well as new paradigms for system architectures beyond present technology. Implementations based on solid-state "spin complexes" formed by individual paramagnetic dopants and neighboring nuclear and electronic spins are of particular importance because spin-based quantum technology is well positioned to overcome the obstacles to scaling. Assembling atomically identical spin clusters, however, is unlikely in the near term future, making new protocols necessary to precisely determine the spatial structure of an individual node and selectively address single spins within the complex. In line with these ideas, this grant articulates state-of-the-art nanoscale technology and novel spin manipulation schemes to resolve the network of relative couplings of nuclear spins in the vicinity of the so-called NV center in diamond, arguably one of the most promising platforms for future spintronic and QIP devices. Underlying our effort is the notion of circuits configured to exploit the atomic scale differences between logic units so as to process quantum information in optimal ways. Capitalizing on multi-dimensional spectroscopy and high-resolution imaging schemes, it will be possible to expose the structure and connectivity within the nuclear spin network of a given node in ways resembling the solving of a complex molecular structure. Such information will be crucial to identifying and exploiting long-lived nuclear memories, or to implementing quantum correction protocols without resorting to additional, ad-hoc coupling interfaces. Besides the technological and scientific advantages, our work is expected to have a broad educational outcome because it will offer students a unique inter-disciplinary scientific training and the ability to interact with a network of collaborating labs. These partnerships not only will provide a broad dissemination platform but also will allow the PI to advance ongoing outreach programs designed to provide meaningful research experiences to underprivileged students through summer activities. These plans gain special meaning at City College, a minority serving institution with a uniquely diverse population of inner-city students. Capitalizing on the various recruitment channels at hand, the teaching, mentoring and career counseling components of this project will truly broaden participation, while encouraging groups underrepresented in the sciences to pursue scientific careers both in academia and in industry.

利用纳米物理系统的量子行为是由各种应用程序进行信息处理和安全通信的承诺驱动的广泛跨学科工作的中心。性能提高和复杂性的增长的前景引起了对现有或新功能（尤其是量子信息处理（QIP）协议）的新设备的兴趣，以及除当前技术以外的系统体系结构的新范式。基于单个顺磁性掺杂剂以及邻近的核和电子自旋形成的固态“旋转复合物”的实现尤其重要，因为基于自旋的量子技术可以很好地克服缩放的障碍。但是，在近期的将来，组装原子相同的旋转簇不太可能，这使得确切确定单个节点的空间结构并选择性地解决复合物中的单次旋转所需的新协议。根据这些想法，这项赠款阐明了最先进的纳米级技术和新颖的旋转操纵方案，以解决钻石所谓的NV中心附近的核自旋相对耦合网络，可以说是未来纺纱和QIP Deceps的最有前途的平台之一。我们的努力的基础是配置的电路概念，以利用逻辑单元之间的原子量表差异，以便以最佳方式处理量子信息。利用多维光谱和高分辨率成像方案，可以以类似于解决复杂分子结构的方式来揭示给定节点的核自旋网络中的结构和连通性。此类信息对于识别和利用长寿命的核记忆或实施量子校正方案而无需诉诸其他临时耦合界面至关重要。除了技术和科学的优势外，我们的工作有望具有广泛的教育成果，因为它将为学生提供独特的跨学科科学培训以及与合作实验室网络互动的能力。这些合作伙伴关系不仅将提供广泛的传播平台，而且还将允许PI推进旨在通过夏季活动为贫困学生提供有意义的研究经验的持续外展计划。这些计划在城市学院获得了特殊意义，城市学院是一个少数派服务机构，拥有独特的城市学生人口。利用当前手头的各种招聘渠道，该项目的教学，指导和职业咨询组成部分将真正扩大参与，同时鼓励在科学领域的人数不足，无法从事学术界和行业的科学职业。