In situ quantum verification of polarization-stabilized optical channels
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arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866914431045206016 |
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| author | Stevens, Matthew L. Wasserbeck, Noah I. Goisman, Zachary Rahman, Arefur Record, John Michael Truong, Taman Haqq, Ariq Alshowkan, Muneer Kirby, Brian T. Otterstrom, Nils T. Lukens, Joseph M. |
| author_facet | Stevens, Matthew L. Wasserbeck, Noah I. Goisman, Zachary Rahman, Arefur Record, John Michael Truong, Taman Haqq, Ariq Alshowkan, Muneer Kirby, Brian T. Otterstrom, Nils T. Lukens, Joseph M. |
| contents | The active stabilization of polarization channels is a task of growing importance as quantum networks move to deployed demonstrations over existing fiber infrastructure. However, the uniquely strict requirements for high-fidelity qubit transmission complicate the extent to which classical solutions may apply to future quantum networks, particularly in terms of recognizing noise sources present in low-flux, nonunitary channels. Here we introduce a novel in situ benchmarking approach that augments a classical polarization tracking system, limited to unitary correction, with simultaneously transmitted quantum light for ancilla-assisted process tomography of the full quantum map. Implemented in a local-area quantum network, our method uses the reconstructed map both to validate the classical compensation and to expose noise sources it fails to capture. A sliding measurement window that continuously updates the estimated quantum process further increases sensitivity to rapid channel fluctuations. Our results should unlock new opportunities for in situ channel characterization in quantum-classical coexistence networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_26034 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | In situ quantum verification of polarization-stabilized optical channels Stevens, Matthew L. Wasserbeck, Noah I. Goisman, Zachary Rahman, Arefur Record, John Michael Truong, Taman Haqq, Ariq Alshowkan, Muneer Kirby, Brian T. Otterstrom, Nils T. Lukens, Joseph M. Quantum Physics The active stabilization of polarization channels is a task of growing importance as quantum networks move to deployed demonstrations over existing fiber infrastructure. However, the uniquely strict requirements for high-fidelity qubit transmission complicate the extent to which classical solutions may apply to future quantum networks, particularly in terms of recognizing noise sources present in low-flux, nonunitary channels. Here we introduce a novel in situ benchmarking approach that augments a classical polarization tracking system, limited to unitary correction, with simultaneously transmitted quantum light for ancilla-assisted process tomography of the full quantum map. Implemented in a local-area quantum network, our method uses the reconstructed map both to validate the classical compensation and to expose noise sources it fails to capture. A sliding measurement window that continuously updates the estimated quantum process further increases sensitivity to rapid channel fluctuations. Our results should unlock new opportunities for in situ channel characterization in quantum-classical coexistence networks. |
| title | In situ quantum verification of polarization-stabilized optical channels |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.26034 |