Efficient ultrafast homodyne detection of quantum light
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866914567467040768 |
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| author | Yoon, Young-Do Roh, Chan Gwak, Geunhee Ra, Young-Sik |
| author_facet | Yoon, Young-Do Roh, Chan Gwak, Geunhee Ra, Young-Sik |
| contents | Ultrafast continuous-variable quantum states offer new opportunities for advanced quantum technologies, but efficient homodyne detection of these states remains challenging. Here, we present a method for efficient ultrafast homodyne detection by exploiting temporal correlations in detector signals. By optimizing the temporal weight used to extract quadrature outcomes, we achieve a substantial increase in the signal-to-noise ratio of ultrafast homodyne detection, thereby improving the detection efficiency. We analyze the autocorrelations of shot noise and electronic noise and determine the optimal weight by solving a generalized Rayleigh quotient problem. The optimal weight enhances the squeezing and anti-squeezing levels observed experimentally. These results highlight the importance of optimized signal processing for efficient quantum measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_14858 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Efficient ultrafast homodyne detection of quantum light Yoon, Young-Do Roh, Chan Gwak, Geunhee Ra, Young-Sik Quantum Physics Ultrafast continuous-variable quantum states offer new opportunities for advanced quantum technologies, but efficient homodyne detection of these states remains challenging. Here, we present a method for efficient ultrafast homodyne detection by exploiting temporal correlations in detector signals. By optimizing the temporal weight used to extract quadrature outcomes, we achieve a substantial increase in the signal-to-noise ratio of ultrafast homodyne detection, thereby improving the detection efficiency. We analyze the autocorrelations of shot noise and electronic noise and determine the optimal weight by solving a generalized Rayleigh quotient problem. The optimal weight enhances the squeezing and anti-squeezing levels observed experimentally. These results highlight the importance of optimized signal processing for efficient quantum measurements. |
| title | Efficient ultrafast homodyne detection of quantum light |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2605.14858 |