Coherent Quantum Phase Slip in Superconducting Nanowires

超导纳米线中的相干量子相滑

• 批准号: 1781318
• 金额: --
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1781318
• 关键词: Coherent; Quantum; Phase; Slip; Superconducting

Quantum fluctuations in one-dimensional superconductors are known to give rise to qualitative changes in behaviour of the superconductor, in a process called quantum phase slip. There are many proposals for superconducting nanowire devices making use of quantum phase slip, such as a quantum current standard, highly sensitive electric charge sensors, and phase slip flux qubits. At the moment this potential remains largely unrealised as the nature of quantum phase slip is still not fully understood. It is now known that successive phase slip events can be phase coherent, leading to a mechanism by which magnetic flux can coherently tunnel across a nanowire, and the superposition of different flux states has recently been demonstrated for the first time. In my project I aim to investigate the nature of coherent quantum phase slips, specifically by observing the interaction of nanowire devices with superconducting resonators, with a view to developing and characterising new coherent quantum phase slip flux qubits.

已知一维超导体中的量子涨落会引起超导体行为的质变，这一过程称为量子相滑移。利用量子相滑的超导纳米线器件有许多建议，如量子电流标准、高灵敏度电荷传感器和相滑通量量子位。目前，由于量子相滑移的性质尚未完全理解，这种潜力在很大程度上仍未实现。现在已经知道，连续的相滑事件可以是相相干的，从而导致磁通可以在纳米线上相干隧穿的机制，并且最近首次证明了不同磁通状态的叠加。在我的项目中，我的目标是研究相干量子相滑移的本质，特别是通过观察纳米线器件与超导谐振器的相互作用，以期开发和表征新的相干量子相滑移通量量子位。

项目成果

Nonlinear Quantum Processes in Superconducting Resonators Terminated by Neon-Focused-Ion-Beam-Fabricated Superconducting Nanowires

由氖聚焦离子束制造的超导纳米线终止的超导谐振器中的非线性量子过程

• DOI: 10.1109/tasc.2020.3018545
• 发表时间: 2020
• 期刊: IEEE Transactions on Applied Superconductivity
• 影响因子: 1.8
• 作者: Potter J