Collaborative Research: Investigation of Superconducting Nanowires and Graphene Junctions Using a Coplanar Fabry-Perot Microwave Resonator as a Qubit Device

合作研究：使用共面法布里-珀罗微波谐振器作为量子位器件研究超导纳米线和石墨烯结

• 批准号: 1005645
• 负责人: Alexey Bezryadin
• 金额: $ 36万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1005645&HistoricalAwards=false
• 关键词: Collaborative; Research; Investigation; Superconducting; Nanowires

****NON-TECHNICAL ABSTRACT****Recently, it became clear that quantum mechanics, which is traditionally used to describe individual and small groups of elementary particles (e.g., electrons and atoms), can also predict the behavior of the so-called "mesoscopic" objects, i.e. systems containing a large number of atoms like large molecules or nanodevices. The goal of this project is to investigate how the laws of quantum mechanics apply to nanowires. These nanowires are metallic cylinders having a diameter of a few billionth of a meter. The project will explore nanowires made out of superconducting metals. The scientific question to be addressed is the applicability of the Heisenberg uncertainty principle to the electrical current and electrical charge in nanodevices involving nanowires. The most advanced nanoscience and nanotechnology will be used to fabricate such wires. The measurements on nanowires will be done using a novel experimental approach, namely a nanowire will be inserted into a special type of microwave resonator called a microwave superconducting Fabry-Perot resonator. This project will explore the possibility of using the hybrid nanowire-resonator devices as qubits, the quantum mechanical analog of the classical "bit" that stores information in a computer. This project will support the education of graduate students in these advanced technologies, which will prepare them for scientific careers in academia and in our most advanced technology industries. Undergraduate students will also participate in the project, gaining training and hands-on experience in the most advanced scientific research. The project will also provide training to a postdoc. This research project receives support from the Division of Materials Research and the Physics Division.****TECHNICAL ABSTRACT****Recently, it became clear that macroscopic degrees of freedom, such as electrical current, can be described by laws of quantum mechanics for so-called mesoscopic systems: for example quantum mechanics is important for describing results of transport measurements in systems involving large molecules, nanoparticles, or superconducting nanodevices. The goal of this project is to investigate how the laws of macroscopic quantum mechanics apply to superconducting nanowires. In particular, quantum phase slips will be investigated. A novel experimental approach will be used, namely the nanowires will be coupled to a superconducting microwave Fabry-Perot resonator. Such a hybrid device will provide complementary experimental information when compared with traditional dc electrical transport measurements. The nanowires are expected to act as nonlinear kinetic inductors. This project will explore the possibility of using the hybrid nanowire-resonator devices as qubits. Such nanowire-qubits should be free of the decoherence mechanisms affecting Josephson tunnel junction so far employed for superconducting qubits. The nanowires will be fabricated and imaged by the most advanced nanotechnology. The measurements will be carried out using ultra-low-temperature refrigerators and ultra-low-noise microwave measurements. This project will support the education of graduate students in these advanced technologies, which will prepare them for scientific careers in academia and in our most advanced technology industries. Undergraduate students will also participate in the project, gaining training and hands-on experience in the most advanced scientific research. The project will also provide training to a postdoc. This research project receives support from the Division of Materials Research and the Physics Division.

****非技术抽象****最近，很明显，传统上用来描述单个和小组基本粒子（例如电子和原子）的量子力学也可以预测SO的行为 - 称为“介镜”对象，即包含大量原子（例如大分子或纳米式）的系统。 该项目的目的是研究量子力学定律如何适用于纳米线。 这些纳米线是金属圆柱体的直径为几十亿米。 该项目将探索由超导金属制成的纳米线。 要解决的科学问题是，纳米线的纳米电路中的电流不确定性原理适用于电流和电荷。 最先进的纳米科学和纳米技术将用于制造此类电线。 纳米线上的测量将使用新型的实验方法进行，即纳米线将插入一种称为微波炉超导的Fabry-Perot谐振器的特殊类型的微波谐振器中。 该项目将探讨使用混合纳米线谐波设备作为Qubits的可能性，即将信息存储在计算机中的经典“位”的量子机械类似物。 该项目将支持这些高级技术的研究生的教育，这将为学术界和我们最先进的技术行业的科学职业做好准备。 本科生还将参加该项目，在最先进的科学研究中获得培训和动手经验。 该项目还将为博士后提供培训。 该研究项目获得了材料研究部和物理部的支持。对于所谓的介观系统：例如，量子力学对于描述涉及大分子，纳米颗粒或超导纳米电视的系统中传输测量结果很重要。 该项目的目的是研究宏观量子力学定律如何适用于超导纳米线。 特别是，将研究量子相滑。 将使用一种新型的实验方法，即纳米线将与超导微波Fabry-Perot共振器耦合。 与传统的直流电运输测量相比，这种混合设备将提供互补的实验信息。 预计纳米线将充当非线性动力学电感器。 该项目将探索使用混合纳米线谐波设备作为Qubits的可能性。 这样的纳米线量应该没有影响迄今为止用于超导量子的约瑟夫森隧道交界处的破坏机制。 最先进的纳米技术将制造和成像纳米线。 测量将使用超低温冰箱和超低噪声微波测量进行。该项目将支持这些高级技术的研究生的教育，这将为学术界和我们最先进的技术行业的科学职业做好准备。 本科生还将参加该项目，在最先进的科学研究中获得培训和动手经验。 该项目还将为博士后提供培训。 该研究项目获得了材料研究部和物理部的支持。