Embedding NbN Nanowires Into Quantum Circuits With a Neon Focused Ion Beam
Embedding NbN Nanowires Into Quantum Circuits With a Neon Focused Ion Beam
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DOI：
10.1109/tasc.2016.2525988
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发表时间：
2016-04-01
影响因子：
1.8
通讯作者：
Fenton, J. C.
中科院分区：
文献类型：
--
作者：
Burnett, J.;Sagar, J.;Fenton, J. C.
作为常规制造和处理的结果，寄生二能级系统通常存在于超导电路中，并且这些导致量子系统中的噪声和相干性损失。我们研究了使用Ne聚焦离子束来生产集成到超导电路中的纳米线，其中寄生两级系统的密度最小化。我们报告测量的纳米线产生的Ne聚焦离子束铣削在NbN谐振器。谐振器损耗在纳米线被制造之后增加，其中Q因子降低近似30%至近似10（5），这比先前测量的最接近的可比电路高10-100倍。这表明，氖聚焦离子束是一个有前途的路线，用于创建超导纳米线为基础的设备与低水平的退相干。
Parasitic two-level systems are generally present in superconducting circuits as a result of conventional fabrication and processing, and these lead to noise and loss of coherence in quantum systems. We examine the use of a Ne focused ion beam for producing nanowires integrated into superconducting circuits with a minimized density of parasitic two-level systems. We report measurements of nanowires produced by Ne focused-ion-beam milling in NbN resonators. The resonator losses increase after the nanowire is fabricated, with the Q factor decreasing by similar to 30% to similar to 10(5), which is a factor 10-100 higher than in the most closely comparable circuits previously measured. This indicates that the Ne focused ion beam is a promising route for creating superconducting-nanowire-based devices with low levels of decoherence.