Clock offset recovery with sublinear complexity enables synchronization on low-level hardware for quantum key distribution
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866915665223352320 |
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| author | Krause, Jan Walenta, Nino Hilt, Jonas Freund, Ronald |
| author_facet | Krause, Jan Walenta, Nino Hilt, Jonas Freund, Ronald |
| contents | We introduce iQSync, a clock offset recovery method designed for implementation on low-level hardware, such as FPGAs or microcontrollers, for quantum key distribution (QKD). iQSync requires minimal memory, only a simple instruction set (e.g. no floating-point operations), and can be evaluated with sublinear time complexity, typically involving no more than a few thousand iterations of a simple loop. Furthermore, iQSync allows for a precise clock offset recovery within few seconds, even for large offsets, and is well suited for scenarios with high channel loss and low signal-to-noise ratio, irrespective of the prepare-and-measure QKD protocol used. We implemented the method on our QKD platform, demonstrating its performance and conformity with analytically derived success probabilities for channel attenuations exceeding 70 dB. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_04081 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Clock offset recovery with sublinear complexity enables synchronization on low-level hardware for quantum key distribution Krause, Jan Walenta, Nino Hilt, Jonas Freund, Ronald Quantum Physics We introduce iQSync, a clock offset recovery method designed for implementation on low-level hardware, such as FPGAs or microcontrollers, for quantum key distribution (QKD). iQSync requires minimal memory, only a simple instruction set (e.g. no floating-point operations), and can be evaluated with sublinear time complexity, typically involving no more than a few thousand iterations of a simple loop. Furthermore, iQSync allows for a precise clock offset recovery within few seconds, even for large offsets, and is well suited for scenarios with high channel loss and low signal-to-noise ratio, irrespective of the prepare-and-measure QKD protocol used. We implemented the method on our QKD platform, demonstrating its performance and conformity with analytically derived success probabilities for channel attenuations exceeding 70 dB. |
| title | Clock offset recovery with sublinear complexity enables synchronization on low-level hardware for quantum key distribution |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2404.04081 |