Mitigating Source and Detection Noises in Auto-correlative Weak-Value Amplification
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2022
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| _version_ | 1866908840006516736 |
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| author | Hu, Xiang-Yun Huang, Jing-Hui He, Fei-Fan Wang, Guang-Jun Dada, Adetunmise C. |
| author_facet | Hu, Xiang-Yun Huang, Jing-Hui He, Fei-Fan Wang, Guang-Jun Dada, Adetunmise C. |
| contents | Weak-value amplification (WVA) is a post-selection-based technique that amplifies weak physical signals by preparing nearly orthogonal pre- and post-selected quantum states. It is intrinsically limited by various kinds of technical noise, which distorts amplified weak values, especially when discarding photons in post-selection. While prior work established the efficacy of auto-correlative weak-value amplification (AWVA) under Gaussian noise, practical implementations face challenges from band-limited laser-source noise and detection noise. Here, we demonstrate that the AWVA protocol robustly suppresses both laser-power fluctuations and detection noise. Numerical experiments in Simulink further reveal AWVA dual advantage. Under high-power conditions, the noise-reduction superiority of AWVA over WVA becomes increasingly pronounced as input laser power increases. In detection-limited regimes, AWVA achieves an order-of-magnitude lower uncertainty, closely approaching the Cramer-Rao bound. This work demonstrates that AWVA improves precision in both high-power laser-noise-dominated and photon-starved regimes, thereby bridging these operating extremes and advancing precision in applications from gravitational-wave detection to hybrid quantum systems. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2209_12732 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Mitigating Source and Detection Noises in Auto-correlative Weak-Value Amplification Hu, Xiang-Yun Huang, Jing-Hui He, Fei-Fan Wang, Guang-Jun Dada, Adetunmise C. Quantum Physics Optics Weak-value amplification (WVA) is a post-selection-based technique that amplifies weak physical signals by preparing nearly orthogonal pre- and post-selected quantum states. It is intrinsically limited by various kinds of technical noise, which distorts amplified weak values, especially when discarding photons in post-selection. While prior work established the efficacy of auto-correlative weak-value amplification (AWVA) under Gaussian noise, practical implementations face challenges from band-limited laser-source noise and detection noise. Here, we demonstrate that the AWVA protocol robustly suppresses both laser-power fluctuations and detection noise. Numerical experiments in Simulink further reveal AWVA dual advantage. Under high-power conditions, the noise-reduction superiority of AWVA over WVA becomes increasingly pronounced as input laser power increases. In detection-limited regimes, AWVA achieves an order-of-magnitude lower uncertainty, closely approaching the Cramer-Rao bound. This work demonstrates that AWVA improves precision in both high-power laser-noise-dominated and photon-starved regimes, thereby bridging these operating extremes and advancing precision in applications from gravitational-wave detection to hybrid quantum systems. |
| title | Mitigating Source and Detection Noises in Auto-correlative Weak-Value Amplification |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2209.12732 |