Autler-townes energy-level engineering for high-quality all-microwave qubit gate
Abstract
High-fidelity entangling gates are essential for realizing large-scale fault-tolerant superconducting quantum computing, yet existing approaches are limited: frequency-tuning techniques induce decoherence, while all-microwave-driven schemes suffer the trade-off between gate speed and leakage rate. Here, we introduce an energy-level engineering technique that employs the Autler-Townes effect to manipulate the nonlinearity of qubits without perturbing the computational subspace or degrading coherence time. This approach enables an experimentally validated, fast (97 ns) and high-fidelity (99.40(9)%) CZ gate, where error analysis reveals that gate errors arise mainly from static decoherence. The scheme facilitates fast, high-quality all-microwave gate operations with a simple topology and can be applied across various quantum platforms.
Versions
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BibTeX
@misc{gao2026autlertownes,
title = {{Autler-townes energy-level engineering for high-quality all-microwave qubit gate}},
author = {Wan-Peng Gao and Xiao-Liang He and Zheng-Qi Niu and Si-Qi Li and Da-Qiang Bao and Kuang Liu and Jian-Qiang You and Jaw-Shen Tsai and Zhen Wang and Zhi-Rong Lin},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.07967},
eprint = {2611.07967},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.07967},
}
RIS
TY - UNPB
TI - Autler-townes energy-level engineering for high-quality all-microwave qubit gate
AU - Wan-Peng Gao
AU - Xiao-Liang He
AU - Zheng-Qi Niu
AU - Si-Qi Li
AU - Da-Qiang Bao
AU - Kuang Liu
AU - Jian-Qiang You
AU - Jaw-Shen Tsai
AU - Zhen Wang
AU - Zhi-Rong Lin
PY - 2026
DA - 2026/11/05
PB - arXiv
DO - 10.48550/arxiv.2611.07967
UR - https://arxiv.org/abs/2611.07967
AB - High-fidelity entangling gates are essential for realizing large-scale fault-tolerant superconducting quantum computing, yet existing approaches are limited: frequency-tuning techniques induce decoherence, while all-microwave-driven schemes suffer the trade-off between gate speed and leakage rate. Here, we introduce an energy-level engineering technique that employs the Autler-Townes effect to manipulate the nonlinearity of qubits without perturbing the computational subspace or degrading coherence time. This approach enables an experimentally validated, fast (97 ns) and high-fidelity (99.40(9)%) CZ gate, where error analysis reveals that gate errors arise mainly from static decoherence. The scheme facilitates fast, high-quality all-microwave gate operations with a simple topology and can be applied across various quantum platforms.
ER -