Robust and High-Fidelity Controlled Two-Qubit Gates via Asymmetric Parallel Resonant Excitation
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866913016197414912 |
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| author | Lin, Licheng Han, Jize Zhu, Peng Wang, Ziyu Yan, Ying Lu, Jie Huang, Zhiguo |
| author_facet | Lin, Licheng Han, Jize Zhu, Peng Wang, Ziyu Yan, Ying Lu, Jie Huang, Zhiguo |
| contents | Implementing high-fidelity controlled two-qubit gates in dipole-dipole interacting systems, such as rare-earth-ion crystals, in hindered by spectral inhomogeneity and weak coupling. Existing method often rely on detuned pulses, making them susceptible to frequency errors and AC Stark shifts. We propose a robust resonant scheme for arbitrary controlled two-qubit gates that utilizes asymmetric excitation and pulse engineering to achieve decoupled, parallel qubit control. Simulations on rare-earth-ion ensemble qubits demonstrate gate fidelities exceeding 99% within a 170 kHz detuning range with off-resonant excitation below 0.2%. This approach offers a robust, scalable route for quantum computing in spectrally crowded systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_07163 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Robust and High-Fidelity Controlled Two-Qubit Gates via Asymmetric Parallel Resonant Excitation Lin, Licheng Han, Jize Zhu, Peng Wang, Ziyu Yan, Ying Lu, Jie Huang, Zhiguo Quantum Physics Implementing high-fidelity controlled two-qubit gates in dipole-dipole interacting systems, such as rare-earth-ion crystals, in hindered by spectral inhomogeneity and weak coupling. Existing method often rely on detuned pulses, making them susceptible to frequency errors and AC Stark shifts. We propose a robust resonant scheme for arbitrary controlled two-qubit gates that utilizes asymmetric excitation and pulse engineering to achieve decoupled, parallel qubit control. Simulations on rare-earth-ion ensemble qubits demonstrate gate fidelities exceeding 99% within a 170 kHz detuning range with off-resonant excitation below 0.2%. This approach offers a robust, scalable route for quantum computing in spectrally crowded systems. |
| title | Robust and High-Fidelity Controlled Two-Qubit Gates via Asymmetric Parallel Resonant Excitation |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.07163 |