Persistent quantum advantage with definite photon-number states in lossy multiple-phase estimation
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866918100378583040 |
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| author | Namkung, Min Kim, Dong-Hyun Hong, Seongjin Lee, Changhyoup Lim, Hyang-Tag |
| author_facet | Namkung, Min Kim, Dong-Hyun Hong, Seongjin Lee, Changhyoup Lim, Hyang-Tag |
| contents | Multiple-phase estimation exploiting quantum states has broad applications in novel sensing and imaging technologies. However, the unavoidable presence of lossy environments in practical settings often diminishes the precision of phase estimations. To address this challenge, we propose an optimal multiple-phase estimation scheme that is inherently robust against photon loss, ensuring a persistent quantum advantage across all levels of photon loss. The scheme employs a multi-mode definite photon-number (DPN) state with weights optimized for given levels of photon loss. We theoretically demonstrate that the DPN state can sustain quantum enhancement in estimation precision under all levels of photon loss, compared to the classical benchmark that employs a coherent state input. The proposed scheme using DPN states generalizes earlier studies employing NOON states, which are only optimal when photon loss is small. We believe that our study, demonstrating persistent robustness to photon loss, paves the way for significant advancements in quantum-enhanced sensing technologies, enabling practical applications and quantum advantages in real-world scenarios. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_16246 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Persistent quantum advantage with definite photon-number states in lossy multiple-phase estimation Namkung, Min Kim, Dong-Hyun Hong, Seongjin Lee, Changhyoup Lim, Hyang-Tag Quantum Physics Multiple-phase estimation exploiting quantum states has broad applications in novel sensing and imaging technologies. However, the unavoidable presence of lossy environments in practical settings often diminishes the precision of phase estimations. To address this challenge, we propose an optimal multiple-phase estimation scheme that is inherently robust against photon loss, ensuring a persistent quantum advantage across all levels of photon loss. The scheme employs a multi-mode definite photon-number (DPN) state with weights optimized for given levels of photon loss. We theoretically demonstrate that the DPN state can sustain quantum enhancement in estimation precision under all levels of photon loss, compared to the classical benchmark that employs a coherent state input. The proposed scheme using DPN states generalizes earlier studies employing NOON states, which are only optimal when photon loss is small. We believe that our study, demonstrating persistent robustness to photon loss, paves the way for significant advancements in quantum-enhanced sensing technologies, enabling practical applications and quantum advantages in real-world scenarios. |
| title | Persistent quantum advantage with definite photon-number states in lossy multiple-phase estimation |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2407.16246 |