Building compact superconducting microwave resonators with Hilbert space-filling curves

Superconducting quantum computing is currently one of the most promising platforms for universal quantum information processing. The readout resonator is an essential integral part of a superconducting qubit, while its size is much larger compared to the Josephson junction. We propose and realize a...

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Bibliographic Details
Published in:Applied physics letters 2022-12, Vol.121 (25)
Main Authors: Jiang, Junliang, Li, Zishuo, Guo, Tingting, Xu, Wenqu, Wei, Xingyu, Zhang, Kaixuan, Zhou, Tianshi, Sheng, Yifan, Cao, Chunhai, Sun, Guozhu, Wu, Peiheng
Format: Article
Language:English
Subjects:
Applied physics
Data processing
Electron beams
Frequency analysis
Hilbert curve
Hilbert space
Josephson junctions
Quantum computing
Quantum phenomena
Qubits (quantum computing)
Resonators
Superconductivity
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Summary:Superconducting quantum computing is currently one of the most promising platforms for universal quantum information processing. The readout resonator is an essential integral part of a superconducting qubit, while its size is much larger compared to the Josephson junction. We propose and realize a new readout resonator using space-filling curves, specifically Hilbert space-filling curves. We introduce the frequency analysis method and demonstrate a qubit sample, in which the Hilbert-space-filling-curves resonator (HSFCR) is used to read out the qubit states. We also propose to fabricate the HSFCRs and Josephson junctions simultaneously in the same processes of E-beam lithography and E-beam evaporation. Our design reduces the resonator area sufficiently and, thus, will help to improve the integration of superconducting qubits, as well as to design other superconducting quantum devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0128964