Solid neon can be used as a solid host for single-electron qubits, and at temperatures of around 10 mK, electron-on-solid-neon charge qubits exhibit long coherence times and high operation fidelities. However, systematic characterization of the noise features of such systems is needed for the development of scalable quantum information architectures. Here, 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 and 10−6μV2/Hz at 0.01 to 1 MHz, which is comparable with common semiconductor hosts. We also show that the electron-on-solid-neon charge qubits operating around 5 GHz frequencies can maintain echo coherence times of over 1 μs at temperatures up to 400 mK.
@article{arxiv.2502.01005,
title = {Solid neon as a noise-resilient host for electron qubits above 100 mK},
author = {Xinhao Li and Christopher S. Wang and Brennan Dizdar and Yizhong Huang and Yutian Wen and Wei Guo and Xufeng Zhang and Xu Han and Xianjing Zhou and Dafei Jin},
journal= {arXiv preprint arXiv:2502.01005},
year = {2026}
}