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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| Schlagworte: | |
| Online-Zugang: | https://arxiv.org/abs/2505.24770 |
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| _version_ | 1866918040206049280 |
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| author | Tang, Jun Wang, Dong-Qing Zhong, Wei Zhou, Lan Sheng, Yu-Bo |
| author_facet | Tang, Jun Wang, Dong-Qing Zhong, Wei Zhou, Lan Sheng, Yu-Bo |
| contents | We investigate phase estimation in a lossy interferometer using entangled coherent states, with particular focus on a scenario where no reference beam is employed. By calculating the quantum Fisher information, we reveal two key results: (1) the metrological equivalence between scenarios with and without a reference beam, established under ideal lossless conditions for the two-phase-shifting configuration,breaks down in the presence of photon loss, and (2) the pronounced inferior performance of entangled coherent states relative to NOON states, observed in the presence of a reference beam, disappears in its absence. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_24770 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Phase estimation in lossy optical interferometry without a reference beam Tang, Jun Wang, Dong-Qing Zhong, Wei Zhou, Lan Sheng, Yu-Bo Quantum Physics We investigate phase estimation in a lossy interferometer using entangled coherent states, with particular focus on a scenario where no reference beam is employed. By calculating the quantum Fisher information, we reveal two key results: (1) the metrological equivalence between scenarios with and without a reference beam, established under ideal lossless conditions for the two-phase-shifting configuration,breaks down in the presence of photon loss, and (2) the pronounced inferior performance of entangled coherent states relative to NOON states, observed in the presence of a reference beam, disappears in its absence. |
| title | Phase estimation in lossy optical interferometry without a reference beam |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2505.24770 |