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Electrons floating on a solid neon exhibit long charge coherence times, making them attractive for hybrid quantum systems. When combined with high-quality, high-impedance superconducting resonators and a local magnetic field gradient, this platform enables strong charge--photon and spin--charge coupling-key ingredients for scalable spin qubit architectures. In this work, we demonstrate that NbTiN nanowire resonators maintain high quality factors around 10^5 after depositing solid neon onto the resonators and subsequently loading electrons onto the neon surface, validating their suitability for electrons-on-neon platforms. Building on these experimental results, we theoretically analyze micromagnet designs and coupling strategies that can enable spin-photon interactions in this platform. Our analysis outlines performance targets for next-generation devices, showing that, at the charge sweet spot, spin qubit gate fidelities exceeding 99.99% for single-qubit operations and 99.9% for two-qubit operations are achievable with natural neon.

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Institutions

Publication Details

Journal
Physical Review Applied
Published
2025-12-24
DOI
https://doi.org/10.1103/jq9v-n4rn
Citations
1
Primary Topic
Mechanical and Optical Resonators
Type
article
Field-Weighted Citation Impact
1.25
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article

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Hiroki Kutsuma, Hirotaka Terai, Erika Kawakami, Shuhei Tamate et al.
1 citations
Physical Review Applied
Mechanical and Optical Resonators
1.25
article

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Hiroki Kutsuma, Hirotaka Terai, Erika Kawakami, Shuhei Tamate, Ye Tian, Dafei Jin, A. Jennings, Ivan Grytsenko, Jianming Wang, Mónica Benito, Xianjing Zhou, H. Ikegami
article en
1 citations

Abstract

Electrons floating on a solid neon exhibit long charge coherence times, making them attractive for hybrid quantum systems. When combined with high-quality, high-impedance superconducting resonators and a local magnetic field gradient, this platform enables strong charge--photon and spin--charge coupling-key ingredients for scalable spin qubit architectures. In this work, we demonstrate that NbTiN nanowire resonators maintain high quality factors around 10^5 after depositing solid neon onto the resonators and subsequently loading electrons onto the neon surface, validating their suitability for electrons-on-neon platforms. Building on these experimental results, we theoretically analyze micromagnet designs and coupling strategies that can enable spin-photon interactions in this platform. Our analysis outlines performance targets for next-generation devices, showing that, at the charge sweet spot, spin qubit gate fidelities exceeding 99.99% for single-qubit operations and 99.9% for two-qubit operations are achievable with natural neon.

Physical Review AppliedVol. 25(2)
Florida State University (US), University of Notre Dame (US), Pioneer (United States) (US), University of Augsburg (DE), Tohoku University (JP), Computing Center (RU), RIKEN Center for Quantum Computing, National Institute of Information and Communications Technology (JP)
Openalex Percentile: Top 17%
Mechanical and Optical Resonators
1.25
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