权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Superconducting NbSi Quantum Phase-Slip Nanowire Devices for Electronics

用于电子器件的超导 NbSi 量子相滑纳米线器件

基本信息

批准号：
EP/J017329/1
负责人：
Jonathan Fenton
金额：
$ 133.51万
依托单位：
University College London
依托单位国家：
英国
项目类别：
Fellowship
财政年份：
2012
资助国家：
英国
起止时间：
2012 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FJ017329%2F1
关键词：
Superconducting NbSi Quantum Phase Slip

项目摘要

We will develop superconducting devices to enable applications in high-technology electronics, based on a quantum-mechanical phenomenon known as quantum phase-slip (QPS). The proposal as a whole is concerned with developing this so-far-little-developed manifestation of quantum mechanics within superconducting nanowires. The developments will be both in our fundamental understanding of the physics, through experimental tests of recently proposed theories, and in moving towards concrete applications by development of circuit elements which will be useful in future nanoscale applications. One specific area of potential for future application is as elements for qubit technologies and thus the research fits into the broader research effort of enabling technologies for quantum computing.The development of coherent QPS devices would open up avenues for developing a gamut of new devices of potential technological importance, as well as for fundamental research. Coherent QPS devices are likely to find applications in both fundamental science and metrology, and the impact could be as marked as the superconducting quantum interference device (or SQUID), which is dual to one of the coherent QPS devices we will develop. The devices are also likely to be of relevance to quantum computing applications, both as qubits in the own right and also as useful circuit elements in future realisations using previously developed solid-state qubits. There is also potential for a QPS-based quantum current standard to be developed and this would have substantial impact on the metrology community.A quantum phase-slip occurs when quantum fluctuations in the superconducting order parameter are sufficiently strong that the phase of the order parameter slips. The key element of each device will be a superconducting nanowire. If such a nanowire has a cross-section sufficiently small, quantum fluctuations may have significant effects and QPS events may occur. In that case, the fundamental quantum-mechanical Heisenberg uncertainty relation between the charge and superconducting phase may noticeably change the current flow through the device and even, counterintuitively, completely block charge transport along the wire, even though it is superconducting. This is a result of the quantum-mechanical nature of the physics.In this research we will develop devices based on the quantum phase-slip, using the state-of-the-art nanofabrication facilities in the London Centre for Nanotechnology. We will experimentally realise a range of coherent QPS devices - including the flux-biased and current-biased QPS transistors and the QPS box - for the first time, with a view to future applications in devices, and we will build on and refine previous experimental work with the aim of realising a prototype QPS-based current standard.

我们将基于称为量子相滑（QPS）的量子力学现象开发超导器件，以实现高科技电子领域的应用。整个提案涉及在超导纳米线中开发这种迄今为止尚未开发的量子力学表现形式。这些发展将体现在我们对物理学的基本理解上，通过最近提出的理论的实验测试，以及通过开发将在未来纳米级应用中有用的电路元件来迈向具体应用。未来应用潜力的一个具体领域是作为量子位技术的要素，因此这项研究适合量子计算使能技术的更广泛的研究工作。相干QPS设备的开发将为开发一系列具有潜在技术重要性的新设备以及基础研究开辟途径。相干 QPS 设备很可能在基础科学和计量学领域都有应用，其影响可能与超导量子干涉设备（或 SQUID）一样显着，它与我们将开发的相干 QPS 设备之一是双重的。这些设备也可能与量子计算应用相关，既可以作为量子位本身，也可以作为使用先前开发的固态量子位的未来实现中的有用电路元件。还有可能开发基于 QPS 的量子电流标准，这将对计量界产生重大影响。当超导有序参数中的量子涨落足够强以至于有序参数的相位滑移时，就会发生量子相滑。每个设备的关键元件将是超导纳米线。如果这样的纳米线具有足够小的横截面，则量子涨落可能具有显着的影响并且可能发生QPS事件。在这种情况下，电荷和超导相之间的基本量子力学海森堡不确定性关系可能会显着改变流经器件的电流，甚至违反直觉地完全阻止沿导线的电荷传输，即使它是超导的。这是物理学的量子力学性质的结果。在这项研究中，我们将使用伦敦纳米技术中心最先进的纳米制造设施来开发基于量子相滑的设备。我们将首次通过实验实现一系列相干QPS器件，包括磁通偏置和电流偏置QPS晶体管以及QPS盒，着眼于未来在器件中的应用，我们将在之前的实验工作的基础上进行完善，以实现基于QPS的电流标准原型。