High Fidelity Single-qubit Gates of a Single Neutral Atom in the Magic-Intensity Optical Dipole Trap

We demonstrate high fidelity single-qubit gate operation in a trapped single neutral atom. The atom is trapped in the recently invented magic-intensity optical dipole trap (MI-ODT) with more stable magnetic field. The MI-ODT efficiently mitigates the detrimental effects of light shifts thus sufficie...

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Bibliographic Details
Published in:arXiv.org 2017-12
Main Authors: Cheng, Sheng, He, Xiaodong, Guo, Ruijun, Wang, Kunpeng, Xu, Peng, Xiong, Zongyuan, Liu, Min, Wang, Jin, Zhan, Mingsheng
Format: Article
Language:English
Subjects:
Dipoles
Errors
Fault tolerance
Gates
Neutral atoms
Performance enhancement
Quantum computers
Quantum theory
Qubits (quantum computing)
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Summary:We demonstrate high fidelity single-qubit gate operation in a trapped single neutral atom. The atom is trapped in the recently invented magic-intensity optical dipole trap (MI-ODT) with more stable magnetic field. The MI-ODT efficiently mitigates the detrimental effects of light shifts thus sufficiently improves the performance of single qubit-gates. The gates are driven with microwave, and the fidelity of gate operation is characterized by using the randomized benchmarking method. We obtain an average error per Clifford gate of \(3.0(7)\times10^{-5}\) which is much below the error threshold (\(10^{-4}\)) for fault-tolerance. This error is found to be dominated by qubit dephasing, and the corresponding coherence time relevant to the Clifford gates is also measured experimentally. This work is an essential step toward the construction of a scalable quantum computer with neutral atoms trapped in an MI-ODT array.
ISSN:2331-8422
DOI:10.48550/arxiv.1712.06306