Quantum-enhanced quickest change detection of transmission loss
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
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| _version_ | 1866912681954377728 |
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| author | Guha, Saikat John, Tiju Cherian Gong, Zihao Basu, Prithwish |
| author_facet | Guha, Saikat John, Tiju Cherian Gong, Zihao Basu, Prithwish |
| contents | Augmenting a train of bright phase-modulated laser-light pulses of a coherent communications system with infinitesimally small quantum photons per pulse -- entangled across several time bins -- prepared by splitting squeezed light in a temporal-mode interferometer can dramatically enhance a homodyne receiver's ability to detect a sudden change in the channel loss, by up to a factor that is the inverse of the pre-change loss, without affecting the communications rate. We discuss the quantum limit of quickest change detection, and the problem of joint communications and change detection that our study opens up. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_12276 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum-enhanced quickest change detection of transmission loss Guha, Saikat John, Tiju Cherian Gong, Zihao Basu, Prithwish Quantum Physics Information Theory Augmenting a train of bright phase-modulated laser-light pulses of a coherent communications system with infinitesimally small quantum photons per pulse -- entangled across several time bins -- prepared by splitting squeezed light in a temporal-mode interferometer can dramatically enhance a homodyne receiver's ability to detect a sudden change in the channel loss, by up to a factor that is the inverse of the pre-change loss, without affecting the communications rate. We discuss the quantum limit of quickest change detection, and the problem of joint communications and change detection that our study opens up. |
| title | Quantum-enhanced quickest change detection of transmission loss |
| topic | Quantum Physics Information Theory |
| url | https://arxiv.org/abs/2503.12276 |