Development of Flux-Tuneable Inductive Nanobridge SQUIDs for Quantum Technology Applications

Development of Flux-Tuneable Inductive Nanobridge SQUIDs for Quantum Technology Applications
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开发用于量子技术应用的通量可调感应纳米桥 SQUID

DOI:
10.1109/tasc.2023.3244771
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发表时间:
2023
影响因子:
1.8
通讯作者:
Meti L
Meti L
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Meti L

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铌纳米桥squid具有优异的噪声性能,在量子信息处理、弱信号检测和单自旋检测中具有潜在的应用前景,其中纳米桥的几何结构应该能够实现与植入自旋的有效电磁耦合。将这种器件与色散微波读出电路相结合,通过克服标准热极限,可以进一步提高自旋灵敏度。本文报道了超导谐振器中铌纳米桥阵列的制备和色散微波读出,包括电子束光刻技术对纳米桥制备工艺的优化。我们证明了谐振的测量通量可调谐性与理论很好地一致,并且我们还讨论了谐振器结构中弱链路的非线性如何允许参数效应的中介以提高性能。
Niobium nanobridge SQUIDs have shown exceptional noise performance with potential applications in quantum information processing, weak signal detection and single spin detection where the nanobridge geometry should enable efficient electromagnetic coupling to implanted spins. Combining such devices with dispersive microwave readout circuitry allows the spin sensitivity to be further improved by overcoming the standard thermal limit. Here we report on the fabrication and dispersive microwave readout of an array of niobium nanobridge rf SQUIDs incorporated into a superconducting resonator, including the optimization of the nanobridge fabrication process by electron beam lithography. We show the measured flux-tuneability of the resonance is in good agreement with theory, and we also discuss how the nonlinearity of the weak-link in the resonator structure allows for the mediation of parametric effects to enhance performance.
具有铁磁势垒的约瑟夫森结的电流相位关系
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EBL 纳米桥 SQUID 的微波感应读数
DOI: 10.1109/tasc.2020.2998374
发表时间: 2020
影响因子: 1.8
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Godfrey T
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