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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.01787 |
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| _version_ | 1866915768544788480 |
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| author | Fan-Yuan, Guan-Jie Shan, Yang-Guang Zhang, Cong Wang, Yu-Long Fan, Yu-Xuan Xie, Wei-Xin He, De-Yong Wang, Shuang Yin, Zhen-Qiang Chen, Wei Fu, Song-Nian Guo, Guang-Can Han, Zheng-Fu |
| author_facet | Fan-Yuan, Guan-Jie Shan, Yang-Guang Zhang, Cong Wang, Yu-Long Fan, Yu-Xuan Xie, Wei-Xin He, De-Yong Wang, Shuang Yin, Zhen-Qiang Chen, Wei Fu, Song-Nian Guo, Guang-Can Han, Zheng-Fu |
| contents | Determining the position of an entity is a fundamental prerequisite for nearly all activities. Classical means, however, have been proven incapable of providing secure position verification, meaning that a prover can mislead verifiers about its actual position. In this work, we propose and experimentally realize a secure position-verification protocol that leverages quantum optics and relativity within an information-theoretic framework. Using phase-randomized weak coherent states, two verifiers separated by 2 km securely verify the prover's position with an accuracy better than 75 meters. These results establish secure position-based authentication as a practical possibility, paving the way for applications in financial transactions, disaster response, and authenticated secure communications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_01787 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Relativistic Position Verification with Coherent States Fan-Yuan, Guan-Jie Shan, Yang-Guang Zhang, Cong Wang, Yu-Long Fan, Yu-Xuan Xie, Wei-Xin He, De-Yong Wang, Shuang Yin, Zhen-Qiang Chen, Wei Fu, Song-Nian Guo, Guang-Can Han, Zheng-Fu Quantum Physics Determining the position of an entity is a fundamental prerequisite for nearly all activities. Classical means, however, have been proven incapable of providing secure position verification, meaning that a prover can mislead verifiers about its actual position. In this work, we propose and experimentally realize a secure position-verification protocol that leverages quantum optics and relativity within an information-theoretic framework. Using phase-randomized weak coherent states, two verifiers separated by 2 km securely verify the prover's position with an accuracy better than 75 meters. These results establish secure position-based authentication as a practical possibility, paving the way for applications in financial transactions, disaster response, and authenticated secure communications. |
| title | Relativistic Position Verification with Coherent States |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2602.01787 |