A High-Power Clock Laser Spectrally Tailored for High-Fidelity Quantum State Engineering
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arXiv
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| Format: | Preprint |
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2025
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| author | Yan, Lingfeng Lannig, Stefan Milner, William R. Frankel, Max N. Lewis, Ben Lee, Dahyeon Kim, Kyungtae Ye, Jun |
| author_facet | Yan, Lingfeng Lannig, Stefan Milner, William R. Frankel, Max N. Lewis, Ben Lee, Dahyeon Kim, Kyungtae Ye, Jun |
| contents | Highly frequency-stable lasers are a ubiquitous tool for optical frequency metrology, precision interferometry, and quantum information science. While making a universally applicable laser is unrealistic, spectral noise can be tailored for specific applications. Here we report a high-power 698 nm clock laser with a maximum output of \SI{4}{W} and minimized frequency noise up to a few kHz Fourier frequency, together with long-term instability of $3.5 \times 10^{-17}$ at one to thousands of seconds. The laser frequency noise is precisely characterized with atom-based spectral analysis that employs a pulse sequence designed to suppress sensitivity to intensity noise. This method provides universally applicable tunability of the spectral response and analysis of quantum sensors over a wide frequency range. With the optimized laser system characterized by this technique, we achieve an average single-qubit Clifford gate fidelity of up to $F_1^2 = 0.99964(3)$ when simultaneously driving 3000 optical qubits with a homogeneous Rabi frequency ranging from \SI{10}{Hz} to $\sim$$\SI{1}{kHz}$. This result represents the highest single optical-qubit gate fidelity for large number of atoms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_09343 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A High-Power Clock Laser Spectrally Tailored for High-Fidelity Quantum State Engineering Yan, Lingfeng Lannig, Stefan Milner, William R. Frankel, Max N. Lewis, Ben Lee, Dahyeon Kim, Kyungtae Ye, Jun Atomic Physics Highly frequency-stable lasers are a ubiquitous tool for optical frequency metrology, precision interferometry, and quantum information science. While making a universally applicable laser is unrealistic, spectral noise can be tailored for specific applications. Here we report a high-power 698 nm clock laser with a maximum output of \SI{4}{W} and minimized frequency noise up to a few kHz Fourier frequency, together with long-term instability of $3.5 \times 10^{-17}$ at one to thousands of seconds. The laser frequency noise is precisely characterized with atom-based spectral analysis that employs a pulse sequence designed to suppress sensitivity to intensity noise. This method provides universally applicable tunability of the spectral response and analysis of quantum sensors over a wide frequency range. With the optimized laser system characterized by this technique, we achieve an average single-qubit Clifford gate fidelity of up to $F_1^2 = 0.99964(3)$ when simultaneously driving 3000 optical qubits with a homogeneous Rabi frequency ranging from \SI{10}{Hz} to $\sim$$\SI{1}{kHz}$. This result represents the highest single optical-qubit gate fidelity for large number of atoms. |
| title | A High-Power Clock Laser Spectrally Tailored for High-Fidelity Quantum State Engineering |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2501.09343 |