Optimal phase estimation in the presence of correlated dephasing
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866915609875316736 |
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| author | Ghosh, Srijon Kobus, Arkadiusz Kurdziałek, Stanisław Demkowicz-Dobrzański, Rafał |
| author_facet | Ghosh, Srijon Kobus, Arkadiusz Kurdziałek, Stanisław Demkowicz-Dobrzański, Rafał |
| contents | We investigate optimal metrological protocols for phase estimation in the presence of correlated dephasing noise, including spin-squeezed states sensing strategies as well as parallel and adaptive protocols optimized using tensor-network based numerical methods. The results are benchmarked against fundamental bounds obtained either via a latest quantum comb extension method or an optimized classical simulation method. We find that the spin-squeezed offer practically optimal performance in the regime where phase fluctuations are positively correlated, but can be outperformed by tensor-network optimized strategies for negatively correlated fluctuations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_07211 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Optimal phase estimation in the presence of correlated dephasing Ghosh, Srijon Kobus, Arkadiusz Kurdziałek, Stanisław Demkowicz-Dobrzański, Rafał Quantum Physics We investigate optimal metrological protocols for phase estimation in the presence of correlated dephasing noise, including spin-squeezed states sensing strategies as well as parallel and adaptive protocols optimized using tensor-network based numerical methods. The results are benchmarked against fundamental bounds obtained either via a latest quantum comb extension method or an optimized classical simulation method. We find that the spin-squeezed offer practically optimal performance in the regime where phase fluctuations are positively correlated, but can be outperformed by tensor-network optimized strategies for negatively correlated fluctuations. |
| title | Optimal phase estimation in the presence of correlated dephasing |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2511.07211 |