CAREER: Developing Hybrid Quantum Systems Using Superconducting Circuits

职业：使用超导电路开发混合量子系统

• 批准号: 1151839
• 负责人: David Schuster
• 金额: $ 60万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-02-01 至 2017-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1151839&HistoricalAwards=false
• 关键词: CAREER; Developing; Hybrid; Quantum; Systems

****TECHNICAL ABSTRACT****This project seeks to study cavity quantum electrodynamics, many-body dynamics, and eventually quantum information, using electrons floating above superfluid helium. Electrons on helium form a unique two-dimensional electron gas levitated by zero-point motion above the superfluid surface. It is exceptionally clean, having the highest known mobility, and is predicted to have long spin coherence, but while it has been studied for many years, little is known about the properties of individual electrons. This project will use superconducting transmission line cavities coherently coupled to first ensembles, and eventually individual trapped electrons. Calculations predict that both the charge and spin dynamics of single electrons on helium possess long coherence times, but these will be the first experimental measurements. These experiments are only possible now because of recent advances in superconducting circuit technology. This project will support the education of a PhD student in these advanced technologies, which has historically shown itself to be excellent training for many scientific careers from academia to our most advanced technology industries. This research combining multiple quantum coherent systems is expected to be of broad interest to the scientific community, and serve as a template for efforts in other fields.****NON-TECHNICAL ABSTRACT****When electrons are sprayed onto the surface of an insulating liquid, they stick to the surface. Amazingly, at low temperatures, just a few degrees above absolute zero, they begin to levitate a few nanometers above the surface due to quantum mechanical effects. When working with atoms or particles, most of the technical challenge is in trapping them in vacuum, but in this special system, the electrons naturally float, like microscopic buoys on the ocean. Because they are levitated, they have pristine properties, but like buoys, they also have complex interactions with waves in the fluid below. This project will pursue experiments to isolate single electrons floating on helium, and probe their complex interactions with light, superfluid waves, and each other. This will be accomplished by employing the most advanced tools of experimental science: nanofabrication, ultra-low temperature physics, and quantum computing electronic devices. This project will support the education of a PhD student in these advanced technologies, which has historically shown itself to be excellent training for many scientific careers from academia to our most advanced technology industries. These studies will advance our understanding of this fascinating system and eventually could lead to quantum computers in which bits are stored by individual electrons, using little power and exponentially speeding important classes of computations.

**** 技术摘要 **** 该项目旨在研究腔量子电动力学，多体动力学，并最终量子信息，使用超流氦上漂浮的电子。 氦上的电子形成一个独特的二维电子气，通过零点运动悬浮在超流表面之上。 它非常干净，具有最高的已知迁移率，并且被预测具有长自旋相干性，但是虽然它已经被研究了多年，但对单个电子的性质知之甚少。 该项目将使用超导传输线腔相干耦合到第一个合奏，并最终个别捕获电子。 计算预测，氦上单电子的电荷和自旋动力学都具有很长的相干时间，但这将是第一次实验测量。由于超导电路技术的最新进展，这些实验现在才成为可能。 该项目将支持这些先进技术的博士生教育，这些先进技术在历史上已经证明是从学术界到我们最先进的技术行业的许多科学职业的优秀培训。这项结合多个量子相干系统的研究预计将引起科学界的广泛兴趣，并作为其他领域努力的模板。非技术摘要 * 当电子被喷射到绝缘液体的表面时，它们会粘附在表面上。 令人惊讶的是，在低温下，仅比绝对零度高几度，由于量子力学效应，它们开始悬浮在表面上方几纳米处。 在处理原子或粒子时，大多数技术挑战是将它们捕获在真空中，但在这个特殊的系统中，电子自然漂浮，就像海洋上的微型浮标一样。 因为它们是悬浮的，所以它们具有原始的特性，但就像浮标一样，它们也与下面流体中的波浪有复杂的相互作用。 该项目将进行实验，分离出漂浮在氦上的单个电子，并探测它们与光、超流体波以及它们之间的复杂相互作用。 这将通过采用最先进的实验科学工具来实现：纳米制造、超低温物理学和量子计算电子设备。该项目将支持这些先进技术的博士生教育，这些先进技术在历史上已经证明是从学术界到我们最先进的技术行业的许多科学职业的优秀培训。这些研究将促进我们对这个迷人系统的理解，并最终可能导致量子计算机，其中比特由单个电子存储，使用很少的功率并以指数方式加速重要类别的计算。