Experimental continuous-variable quantum key distribution using a thermal source
Gaussian-modulated coherent-state (GMCS) continuous-variable quantum key distribution (CVQKD) protocol can allow authenticated users to share secret key with unconditional security. So far, all previous experimental implementations of GMCS CVQKD schemes are based on active modulations, i.e. amplitud...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac3684 |
| _version_ | 1797749997369819136 |
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| author | Peng Huang Tao Wang Rui Chen Ping Wang Yingming Zhou Guihua Zeng |
| author_facet | Peng Huang Tao Wang Rui Chen Ping Wang Yingming Zhou Guihua Zeng |
| author_sort | Peng Huang |
| collection | DOAJ |
| description | Gaussian-modulated coherent-state (GMCS) continuous-variable quantum key distribution (CVQKD) protocol can allow authenticated users to share secret key with unconditional security. So far, all previous experimental implementations of GMCS CVQKD schemes are based on active modulations, i.e. amplitude and phase modulators and quantum random number generator (QRNG) are required. However, high-speed modulation with high extinction ratio and stability is challenging, which is extremely remarkable in chip-scale silicon photonic realization. While the passive-state-preparation (PSP) CVQKD scheme, which explores the intrinsic field fluctuations of a thermal source, avoids the uses of active modulations and QRNG. In this paper, we experimentally realize the intact PSP CVQKD through a realistic optical fiber channel using off-the-shelf amplified spontaneous emission source. In particular, specially designed frame synchronization method is used to build the correlation between the data measured from the two legitimate parties, and excess noise are synthetically controlled to generate secure secret keys at the metro-area distances when considering the practical and non-negligible finite-size effects under collective Gaussian attacks. Due to the avoidance of modulators and QRNG, the passive state encoding scheme provides a promising direction of applicable high-speed, chip-based and even sunlight-based CVQKD with less cost and complexity. |
| first_indexed | 2024-03-12T16:26:33Z |
| format | Article |
| id | doaj.art-8678de262c534ec988e5664243f1ce68 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:26:33Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-8678de262c534ec988e5664243f1ce682023-08-08T15:40:57ZengIOP PublishingNew Journal of Physics1367-26302021-01-01231111302810.1088/1367-2630/ac3684Experimental continuous-variable quantum key distribution using a thermal sourcePeng Huang0https://orcid.org/0000-0003-1449-1499Tao Wang1Rui Chen2Ping Wang3Yingming Zhou4Guihua Zeng5State Key Laboratory of Advanced Optical Communication Systems and Networks, Center for Quantum Sensing and Information Processing, Shanghai Jiao Tong University , Shanghai 200240, People’s Republic of China; Shanghai Research Center for Quantum Sciences , Shanghai 201315, People’s Republic of ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Center for Quantum Sensing and Information Processing, Shanghai Jiao Tong University , Shanghai 200240, People’s Republic of China; Shanghai Research Center for Quantum Sciences , Shanghai 201315, People’s Republic of ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Center for Quantum Sensing and Information Processing, Shanghai Jiao Tong University , Shanghai 200240, People’s Republic of ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Center for Quantum Sensing and Information Processing, Shanghai Jiao Tong University , Shanghai 200240, People’s Republic of ChinaShanghai XunTai Quantech Co., Ltd , Shanghai, 200241, People’s Republic of ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Center for Quantum Sensing and Information Processing, Shanghai Jiao Tong University , Shanghai 200240, People’s Republic of China; Shanghai Research Center for Quantum Sciences , Shanghai 201315, People’s Republic of ChinaGaussian-modulated coherent-state (GMCS) continuous-variable quantum key distribution (CVQKD) protocol can allow authenticated users to share secret key with unconditional security. So far, all previous experimental implementations of GMCS CVQKD schemes are based on active modulations, i.e. amplitude and phase modulators and quantum random number generator (QRNG) are required. However, high-speed modulation with high extinction ratio and stability is challenging, which is extremely remarkable in chip-scale silicon photonic realization. While the passive-state-preparation (PSP) CVQKD scheme, which explores the intrinsic field fluctuations of a thermal source, avoids the uses of active modulations and QRNG. In this paper, we experimentally realize the intact PSP CVQKD through a realistic optical fiber channel using off-the-shelf amplified spontaneous emission source. In particular, specially designed frame synchronization method is used to build the correlation between the data measured from the two legitimate parties, and excess noise are synthetically controlled to generate secure secret keys at the metro-area distances when considering the practical and non-negligible finite-size effects under collective Gaussian attacks. Due to the avoidance of modulators and QRNG, the passive state encoding scheme provides a promising direction of applicable high-speed, chip-based and even sunlight-based CVQKD with less cost and complexity.https://doi.org/10.1088/1367-2630/ac3684continuous-variable quantum key distributionthermal statepassive-state-preparation |
| spellingShingle | Peng Huang Tao Wang Rui Chen Ping Wang Yingming Zhou Guihua Zeng Experimental continuous-variable quantum key distribution using a thermal source New Journal of Physics continuous-variable quantum key distribution thermal state passive-state-preparation |
| title | Experimental continuous-variable quantum key distribution using a thermal source |
| title_full | Experimental continuous-variable quantum key distribution using a thermal source |
| title_fullStr | Experimental continuous-variable quantum key distribution using a thermal source |
| title_full_unstemmed | Experimental continuous-variable quantum key distribution using a thermal source |
| title_short | Experimental continuous-variable quantum key distribution using a thermal source |
| title_sort | experimental continuous variable quantum key distribution using a thermal source |
| topic | continuous-variable quantum key distribution thermal state passive-state-preparation |
| url | https://doi.org/10.1088/1367-2630/ac3684 |
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