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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2502.17406 |
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| _version_ | 1866918146034630656 |
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| author | Li, Lintao Hu, Xiye Jia, Zhubing Huie, William Sun, Won Kyu Calvin Aakash Dong, Yuhao Hiri-O-Tuppa, Narisak Covey, Jacob P. |
| author_facet | Li, Lintao Hu, Xiye Jia, Zhubing Huie, William Sun, Won Kyu Calvin Aakash Dong, Yuhao Hiri-O-Tuppa, Narisak Covey, Jacob P. |
| contents | The integration of quantum computers and sensors into a quantum network opens a new frontier for quantum information science. We demonstrate high-fidelity entanglement between ytterbium-171 atoms -- the basis for state-of-the-art atomic quantum processors and optical atomic clocks -- and optical photons directly generated in the telecommunication wavelength band where loss in optical fiber is minimal. We entangle the nuclear spin of the atom with a single photon in the time bin basis, and find an atom measurement-corrected (raw) atom-photon Bell state fidelity of $0.950(9)\pm0.005(3)_\text{bound}$ ($0.90(1)\pm0.014(3)_\text{bound}$). Photon measurement errors contribute $\approx0.037$ to our infidelity and can be removed with straightforward upgrades. Additionally, by imaging our atom array onto an optical fiber array, we demonstrate a parallelized networking protocol that can provide an $N$-fold boost in the remote entanglement rate. Finally, we demonstrate the ability to preserve coherence on a memory qubit while performing networking operations on communication qubits. Our work is a major step towards the integration of atomic processors and optical clocks into a high-rate or long-distance quantum network. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_17406 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Parallelized telecom quantum networking with a ytterbium-171 atom array Li, Lintao Hu, Xiye Jia, Zhubing Huie, William Sun, Won Kyu Calvin Aakash Dong, Yuhao Hiri-O-Tuppa, Narisak Covey, Jacob P. Quantum Physics Atomic Physics The integration of quantum computers and sensors into a quantum network opens a new frontier for quantum information science. We demonstrate high-fidelity entanglement between ytterbium-171 atoms -- the basis for state-of-the-art atomic quantum processors and optical atomic clocks -- and optical photons directly generated in the telecommunication wavelength band where loss in optical fiber is minimal. We entangle the nuclear spin of the atom with a single photon in the time bin basis, and find an atom measurement-corrected (raw) atom-photon Bell state fidelity of $0.950(9)\pm0.005(3)_\text{bound}$ ($0.90(1)\pm0.014(3)_\text{bound}$). Photon measurement errors contribute $\approx0.037$ to our infidelity and can be removed with straightforward upgrades. Additionally, by imaging our atom array onto an optical fiber array, we demonstrate a parallelized networking protocol that can provide an $N$-fold boost in the remote entanglement rate. Finally, we demonstrate the ability to preserve coherence on a memory qubit while performing networking operations on communication qubits. Our work is a major step towards the integration of atomic processors and optical clocks into a high-rate or long-distance quantum network. |
| title | Parallelized telecom quantum networking with a ytterbium-171 atom array |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2502.17406 |