Experimental Measurement-Device-Independent Quantum Cryptographic Conferencing
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866917909449670656 |
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| author | Du, Yifeng Liu, Yufeng Yang, Chengdong Zheng, Xiaodong Zhu, Shining Ma, Xiao-song |
| author_facet | Du, Yifeng Liu, Yufeng Yang, Chengdong Zheng, Xiaodong Zhu, Shining Ma, Xiao-song |
| contents | Quantum cryptographic conferencing (QCC) allows sharing secret keys among multiple distant users and plays a crucial role in quantum networks. Because of the fragility and low generation rate of genuine multipartite entangled states required in QCC, realizing and extending QCC with the entanglement-based protocol is challenging. Measurement-device-independent (MDI) QCC, which removes all detector side channels, is a feasible long-distance quantum communication scheme to practically generate multipartite correlation with multiphoton projection measurement. Here we experimentally realize the three-user MDIQCC protocol with four-intensity decoy-state method, in which we employ the polarization encoding and the Greenberger-Horne-Zeilinger state projection measurement. Our work demonstrates the experimental feasibility of the MDI QCC, which lays the foundation for the future realization of quantum networks with multipartite communication tasks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_14890 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Experimental Measurement-Device-Independent Quantum Cryptographic Conferencing Du, Yifeng Liu, Yufeng Yang, Chengdong Zheng, Xiaodong Zhu, Shining Ma, Xiao-song Quantum Physics Optics Quantum cryptographic conferencing (QCC) allows sharing secret keys among multiple distant users and plays a crucial role in quantum networks. Because of the fragility and low generation rate of genuine multipartite entangled states required in QCC, realizing and extending QCC with the entanglement-based protocol is challenging. Measurement-device-independent (MDI) QCC, which removes all detector side channels, is a feasible long-distance quantum communication scheme to practically generate multipartite correlation with multiphoton projection measurement. Here we experimentally realize the three-user MDIQCC protocol with four-intensity decoy-state method, in which we employ the polarization encoding and the Greenberger-Horne-Zeilinger state projection measurement. Our work demonstrates the experimental feasibility of the MDI QCC, which lays the foundation for the future realization of quantum networks with multipartite communication tasks. |
| title | Experimental Measurement-Device-Independent Quantum Cryptographic Conferencing |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2411.14890 |