High fidelity control of superconducting qubits with optical transmitted signal
Abstract
Superconducting circuits exhibit remarkable potential for constructing large-scale quantum simulation and computation systems, featuring numerous qubits, extended coherence time, and precise control. Nevertheless, the growing number of signal cables poses a challenge in dilution refrigerators due to space and heat load constraints. To overcome this issue, we experimentally implemented an optically-assisted transmission line as an alternative to coaxial cables. By modulating microwave signals on laser intensities at room temperature and regenerating the signals at a cryogenic plate within the dilution refrigerator, we demonstrated full control of superconducting qubits using photocurrent. We demonstrate and benchmark both single-qubit and two-qubit gates on frequency tunable transmon qubits, achieving fidelities of 99.915% ± 0.005% and 99.676% ± 0.041%, respectively, which have reached the requirement of the surface code.
Versions
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BibTeX
@misc{li2026high,
title = {{High fidelity control of superconducting qubits with optical transmitted signal}},
author = {Yu-Huai Li and Daojin Fan and Na Li and Fusheng Chen and Shaowei Li and Dong-Dong Li and Yu Xu and Jin Lin and Ming Gong and He-Liang Huang and Hui Deng and Yulin Wu and Haoran Qian and Shaojun Guo and Futian Liang and Xiaobo Zhu and Cheng-Zhi Peng and Jian-Wei Pan},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.19602},
eprint = {2608.19602},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.19602},
}
RIS
TY - UNPB
TI - High fidelity control of superconducting qubits with optical transmitted signal
AU - Yu-Huai Li
AU - Daojin Fan
AU - Na Li
AU - Fusheng Chen
AU - Shaowei Li
AU - Dong-Dong Li
AU - Yu Xu
AU - Jin Lin
AU - Ming Gong
AU - He-Liang Huang
AU - Hui Deng
AU - Yulin Wu
AU - Haoran Qian
AU - Shaojun Guo
AU - Futian Liang
AU - Xiaobo Zhu
AU - Cheng-Zhi Peng
AU - Jian-Wei Pan
PY - 2026
DA - 2026/08/20
PB - arXiv
DO - 10.48550/arxiv.2608.19602
UR - https://arxiv.org/abs/2608.19602
AB - Superconducting circuits exhibit remarkable potential for constructing large-scale quantum simulation and computation systems, featuring numerous qubits, extended coherence time, and precise control. Nevertheless, the growing number of signal cables poses a challenge in dilution refrigerators due to space and heat load constraints. To overcome this issue, we experimentally implemented an optically-assisted transmission line as an alternative to coaxial cables. By modulating microwave signals on laser intensities at room temperature and regenerating the signals at a cryogenic plate within the dilution refrigerator, we demonstrated full control of superconducting qubits using photocurrent. We demonstrate and benchmark both single-qubit and two-qubit gates on frequency tunable transmon qubits, achieving fidelities of 99.915% ± 0.005% and 99.676% ± 0.041%, respectively, which have reached the requirement of the surface code.
ER -