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Coherent manipulation of a tunable hybrid qubit via microwave control |
| Si-Si Gu(顾思思)1,2, Bao-Chuan Wang(王保传)1,2, Hai-Ou Li(李海欧)1,2, Gang Cao(曹刚)1,2,†, and Guo-Ping Guo(郭国平)1,2,3 |
1. CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
2. CAS Center For Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
3. Origin Quantum Computing Company Limited, Hefei 230026, China |
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Abstract Hybrid qubits enable the hybridization of charge and spin degrees of freedom, which provides a way to realize both a relatively long coherence time and rapid qubit manipulation. Here, we use microwave driving to demonstrate the coherent operation of a tunable hybrid qubit, including X-rotation, Z-rotation, and rotation around an arbitrary axis in the X-Y panel of the Bloch sphere. Moreover, the coherence properties of the qubit and its tunability are studied. The measured coherence time of the X-rotation reaches ～ 14.3 ns. While for the Z-rotation, the maximum decoherence time is ～ 5.8 ns due to the larger sensitivity to noise. By employing the Hahn echo sequence to mitigate the influence of the low-frequency noise, we have improved the qubit coherence time from ～ 5.8 ns to ～ 15.0 ns. Our results contribute to a further understanding of the hybrid qubit and a step towards achieving high-fidelity qubit gates in the hybrid qubit.
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Received: 23 March 2023
Revised: 25 April 2023
Accepted manuscript online:
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PACS:
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73.21.La
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(Quantum dots)
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85.35.Be
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(Quantum well devices (quantum dots, quantum wires, etc.))
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03.67.Lx
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(Quantum computation architectures and implementations)
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42.50.Wk
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(Mechanical effects of light on material media, microstructures and particles)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos.92265113, 12074368, and 12034018) and the USTC Tang Scholarship. |
Cite this article:
Si-Si Gu(顾思思), Bao-Chuan Wang(王保传), Hai-Ou Li(李海欧), Gang Cao(曹刚), and Guo-Ping Guo(郭国平) Coherent manipulation of a tunable hybrid qubit via microwave control 2023 Chin. Phys. B 32 087302
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