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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2603.20718 |
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| _version_ | 1866914412978241536 |
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| author | Han, Jahyeok Le, Donghyeok Ryu, Minseok Assad, Syed Kim, Yong-Su Bae, Sunghyun |
| author_facet | Han, Jahyeok Le, Donghyeok Ryu, Minseok Assad, Syed Kim, Yong-Su Bae, Sunghyun |
| contents | We propose a frequency-division multiplexed (FDM) continuous-variable quantum key distribution (CV-QKD) system with enhanced spectral efficiency through dense multiplexing of low-symbol-rate signals. A four-channel 10-Mbaud FDM-CV-QKD system was experimentally demonstrated using Gaussian modulation, a transmitted local oscillator, and homodyne detection. Under a finite-size scenario (N = 10^7), the system achieved a 3.7-fold back-to-back secret key rate gain and outperformed the single-channel system for distances up to 41.1 km. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_20718 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Frequency-Division Multiplexed CV-QKD System Han, Jahyeok Le, Donghyeok Ryu, Minseok Assad, Syed Kim, Yong-Su Bae, Sunghyun Quantum Physics Cryptography and Security We propose a frequency-division multiplexed (FDM) continuous-variable quantum key distribution (CV-QKD) system with enhanced spectral efficiency through dense multiplexing of low-symbol-rate signals. A four-channel 10-Mbaud FDM-CV-QKD system was experimentally demonstrated using Gaussian modulation, a transmitted local oscillator, and homodyne detection. Under a finite-size scenario (N = 10^7), the system achieved a 3.7-fold back-to-back secret key rate gain and outperformed the single-channel system for distances up to 41.1 km. |
| title | Frequency-Division Multiplexed CV-QKD System |
| topic | Quantum Physics Cryptography and Security |
| url | https://arxiv.org/abs/2603.20718 |