Scalable diamond quantum systems

可扩展的金刚石量子系统

• 批准号: 2150633
• 负责人: Jelena Vuckovic
• 金额: $ 40万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-05-01 至 2025-04-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2150633&HistoricalAwards=false
• 关键词: Scalable; diamond; quantum; systems

Color centers in diamond are impurities which give color to this otherwise colorless crystal. In addition to jewelry, they are also of scientific importance and have emerged as a promising platform for implementing quantum technologies such as quantum networks, sensors, and computers. We propose to further investigate and develop the tin-vacancy (SnV) color center in diamond, which is particularly promising because of its operation at friendlier temperatures (not requiring dilution refrigerators), high efficiency of photon emission, and ability to act as quantum memory and store quantum information. However, for all of these applications it is critical to embed either individual or several color centers inside of photonic structures, in order to implement interfaces to color centers without degrading them. We propose to do this over the course of this project, and to push the limits of such quantum photonic interfaces and interaction between color centers and light with specially engineered diamond structures, new materials processing, and new design techniques. We will demonstrate the interaction of one or a few color center qubits with an optical resonator over the course of this project, which is a key element of many quantum technologies. The proposed research will impact quantum engineering, fundamental physics, and materials science. The project includes educational and outreach activities integrated with research, which the PI has already initiated, including active recruitment of minorities and women for science and engineering careers, and undergraduate research and advising. Technical description We propose a 3-year effort focused on developing optically accessible spin qubits with long coherence time, high operation fidelity, efficient light-matter interfaces for long-range interactions, and the potential for high-temperature operation (a few Kelvin, eliminating the need for a dilution refrigerator). We will develop this system based on tin-vacancy (SnV) centers in diamond photonic resonators. The specific research goals are: ● To investigate novel nano-fabrication methods on diamond substrates that enable controllable, strong coupling of a single SnV and several SnV color centers to the cavity.● To demonstrate and to investigate single and multi-emitter cavity QED between SnV emitters and a diamond cavity. The demonstration of the strong coupling regime of light-matter interaction is crucial for numerous quantum technologies, and can be used as a building block for quantum network nodes, quantum sensors, and for scalable photonic or spin based quantum computing.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.

钻石中的色心是一种杂质，它给这种无色的晶体带来颜色。除了珠宝，它们也具有科学重要性，并已成为实现量子网络，传感器和计算机等量子技术的有前途的平台。我们建议进一步研究和开发金刚石中的锡空位（SnV）色心，这是特别有前途的，因为它在更友好的温度下工作（不需要稀释制冷机），光子发射效率高，并且能够作为量子存储器和存储量子信息。然而，对于所有这些应用，关键是将单个或多个色心嵌入光子结构内部，以便实现色心的接口而不使其退化。我们建议在这个项目的过程中做到这一点，并推动这种量子光子界面的极限以及色心与光之间的相互作用，特别是设计的钻石结构，新材料加工和新的设计技术。我们将在这个项目的过程中演示一个或几个色心量子比特与光学谐振器的相互作用，这是许多量子技术的关键要素。拟议的研究将影响量子工程，基础物理和材料科学。该项目包括与研究相结合的教育和外联活动，PI已经启动，包括积极招聘少数民族和妇女从事科学和工程职业，以及本科生研究和咨询。 技术描述我们提出了一个为期3年的努力，重点是开发光学可访问的自旋量子比特，具有长相干时间，高操作保真度，有效的光-物质界面，用于远程相互作用，以及高温操作的潜力（几个开尔文，消除了对稀释冰箱的需要）。我们将发展这个系统的基础上，锡空位（SnV）中心的钻石光子谐振器。具体的研究目标是：●研究金刚石衬底上的新型纳米制造方法，使单个SnV和多个SnV色心与腔体的可控强耦合。●演示和研究SnV发射体与金刚石腔体之间的单发射体和多发射体腔体QED。光-物质相互作用的强耦合机制的演示对于众多量子技术至关重要，可用作量子网络节点、量子传感器和可扩展光子或自旋量子计算的构建块。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。