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DOE OSTI · 2932693

Solid neon as a noise-resilient host for electron qubits above 100 mK

Li, Xinhao [Argonne National Laboratory (ANL), Argonne, IL (United States); Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000206647775)·Wang, Christopher S. [Univ. of Chicago, IL (United States)]·Dizdar, Brennan [Univ. of Chicago, IL (United States)] (ORCID:0000000184259914)·Huang, Yizhong [Argonne National Laboratory (ANL), Argonne, IL (United States); Northeastern Univ., Boston, MA (United States)] (ORCID:0000000339098685)·Wen, Yutian [University of Notre Dame, IN (United States)] (ORCID:0000000234572571)·Guo, Wei [Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)] (ORCID:0000000294663213)·Zhang, Xufeng [Northeastern Univ., Boston, MA (United States)] (ORCID:0000000194924244)·Han, Xu [Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)] (ORCID:0000000344670885)·Zhou, Xianjing [Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)] (ORCID:0000000201377921)·Jin, Dafei [Argonne National Laboratory (ANL), Argonne, IL (United States); University of Notre Dame, IN (United States)] (ORCID:0000000280353580)
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Abstract

Solid neon can be used as a solid host for single-electron qubits. At temperatures of around 10 mK, electron-on-solid-neon charge qubits exhibit long coherence times and high operation fidelities. However, a systematic characterization of the noise features of such systems is needed for the development of scalable quantum information architectures. Here, in this work, we show that solid neon can be used as a noise-resilient host for electron qubits above 100 mK. We examine the resilience of solid neon against charge and thermal noise when electron-on-solid-neon charge qubits are operated away from the charge-insensitive sweet spot and at elevated temperatures. We show that the extracted high-frequency charge noise density of electron-on-solid-neon qubits, projected as voltage fluctuations on nearby electrodes, is between 10 −4 μV 2 Hz −1 and 10 −6 μV 2 Hz −1 at 0.01 MHz to 1 MHz, which is comparable to common semiconductor hosts. We also show that the electron-on-solid-neon charge qubits operating at frequencies of around 5 GHz can maintain echo coherence times of over 1 μs at temperatures up to 400 mK.

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Li, Xinhao [Argonne National Laboratory (ANL), Argonne, IL (United States); Harvard Univ., Cambridge, MA (United States)] (ORCID:0000000206647775), Wang, Christopher S. [Univ. of Chicago, IL (United States)], Dizdar, Brennan [Univ. of Chicago, IL (United States)] (ORCID:0000000184259914), Huang, Yizhong [Argonne National Laboratory (ANL), Argonne, IL (United States); Northeastern Univ., Boston, MA (United States)] (ORCID:0000000339098685), Wen, Yutian [University of Notre Dame, IN (United States)] (ORCID:0000000234572571), Guo, Wei [Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)] (ORCID:0000000294663213), Zhang, Xufeng [Northeastern Univ., Boston, MA (United States)] (ORCID:0000000194924244), Han, Xu [Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)] (ORCID:0000000344670885), Zhou, Xianjing [Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)] (ORCID:0000000201377921), Jin, Dafei [Argonne National Laboratory (ANL), Argonne, IL (United States); University of Notre Dame, IN (United States)] (ORCID:0000000280353580). 2026-04-29. Solid neon as a noise-resilient host for electron qubits above 100 mK. https://doi.org/10.1038/s41928-026-01613-4

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