Refrence-Frame-Independent Quantum Key Distribution over 250 km of Optical Fiber
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913589487468544 |
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| author | Liu, Xin Luo, Di Luo, Zhicheng Li, Shizhuo Zhang, Zhenrong Wei, Kejin |
| author_facet | Liu, Xin Luo, Di Luo, Zhicheng Li, Shizhuo Zhang, Zhenrong Wei, Kejin |
| contents | The reference-frame-independent quantum key distribution (RFI QKD) protocol enables QKD systems to function effectively despite slowly varying reference frames, offering a distinct advantage in practical scenarios, particularly in mobile platforms. In this study, we successfully distribute secure key bits over a 250-km optical fiber distance by developing an RFI QKD system with a repetition rate of 150 MHz. Benefiting from high repetition rate, we achieve a finite-key secret key rate of 49.65 bit/s at a distance of 200 km, which is more than three times higher than state-of-the-art systems. Our work dramatically extends the transmission distance and enhances the secret key rate of RFI QKD, significantly promoting its practical application. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_16558 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Refrence-Frame-Independent Quantum Key Distribution over 250 km of Optical Fiber Liu, Xin Luo, Di Luo, Zhicheng Li, Shizhuo Zhang, Zhenrong Wei, Kejin Quantum Physics The reference-frame-independent quantum key distribution (RFI QKD) protocol enables QKD systems to function effectively despite slowly varying reference frames, offering a distinct advantage in practical scenarios, particularly in mobile platforms. In this study, we successfully distribute secure key bits over a 250-km optical fiber distance by developing an RFI QKD system with a repetition rate of 150 MHz. Benefiting from high repetition rate, we achieve a finite-key secret key rate of 49.65 bit/s at a distance of 200 km, which is more than three times higher than state-of-the-art systems. Our work dramatically extends the transmission distance and enhances the secret key rate of RFI QKD, significantly promoting its practical application. |
| title | Refrence-Frame-Independent Quantum Key Distribution over 250 km of Optical Fiber |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2405.16558 |