Field Test of Quantum Key Distribution with High Key Creation Efficiency
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916283527725056 |
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| author | Kao, Yung-Cheng Huang, Sheng-Hsuan Chang, Chin-Hsuan Wu, Chih-Hsiang Chu, Shih-Hsien Jiang, Jian Zhang, An-Chi Huang, Sheng-Yao Yan, Jhih-Heng Feng, Kai-Ming Chuu, Chih-Sung |
| author_facet | Kao, Yung-Cheng Huang, Sheng-Hsuan Chang, Chin-Hsuan Wu, Chih-Hsiang Chu, Shih-Hsien Jiang, Jian Zhang, An-Chi Huang, Sheng-Yao Yan, Jhih-Heng Feng, Kai-Ming Chuu, Chih-Sung |
| contents | Quantumkey distribution (QKD) promises unconditional security for communication. However, the random choices of the measurement basis in QKD usually result in low key creation efficiency. This drawback is overcome in the differential-phase-shift QKD, provided that each photon can be prepared in a large number of time bins with a proper waveform. In this work we develop a miniature 1550-nm single-photon source to generate narrowband single photon in 50 time bins with a nearly optimal waveform for achieving unity key creation efficiency. By utilizing these single photons in the field test, we demonstrate the differential-phase-shift QKD with a key creation efficiency of 97%. Our work shows that the practical QKD can benefit from the narrowband single photons with controllable waveforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_07786 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Field Test of Quantum Key Distribution with High Key Creation Efficiency Kao, Yung-Cheng Huang, Sheng-Hsuan Chang, Chin-Hsuan Wu, Chih-Hsiang Chu, Shih-Hsien Jiang, Jian Zhang, An-Chi Huang, Sheng-Yao Yan, Jhih-Heng Feng, Kai-Ming Chuu, Chih-Sung Quantum Physics Quantumkey distribution (QKD) promises unconditional security for communication. However, the random choices of the measurement basis in QKD usually result in low key creation efficiency. This drawback is overcome in the differential-phase-shift QKD, provided that each photon can be prepared in a large number of time bins with a proper waveform. In this work we develop a miniature 1550-nm single-photon source to generate narrowband single photon in 50 time bins with a nearly optimal waveform for achieving unity key creation efficiency. By utilizing these single photons in the field test, we demonstrate the differential-phase-shift QKD with a key creation efficiency of 97%. Our work shows that the practical QKD can benefit from the narrowband single photons with controllable waveforms. |
| title | Field Test of Quantum Key Distribution with High Key Creation Efficiency |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2406.07786 |