Asymmetric sending or not-sending twin-field quantum key distribution in practice
| Autor: | Qin Wang, Chun-Mei Zhang, Xing-Yu Zhou, Chun-Hui Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
Key generation Quantum Physics Field (physics) business.industry FOS: Physical sciences Quantum key distribution 01 natural sciences 010305 fluids & plasmas Transmission (telecommunications) Alice and Bob 0103 physical sciences 010306 general physics business Quantum Physics (quant-ph) Protocol (object-oriented programming) Quantum Channel asymmetry Computer network |
| DOI: | 10.48550/arxiv.1902.03385 |
| Popis: | Quantum key distribution (QKD) offers a secret way to share keys between legitimate users which is guaranteed by the law of quantum mechanics. Most recently, the limitation of transmission distance without quantum repeaters was broken through by twin-field QKD [Nature (London) 557, 400 (2018)]. Based on its main idea, sending or not-sending (SNS) QKD protocol was proposed [Phys. Rev. A 98, 062323 (2018)], which filled the remaining security loopholes and can tolerate large misalignment errors. In this paper, we give a more general model for SNS QKD, where the two legitimate users, Alice and Bob, can possess asymmetric quantum channels. By applying the method present in the work, the legitimate users can achieve dramatically increased key generation rate and transmission distance compared with utilizing the original symmetric protocol. Therefore, our present work represents a further step along the progress of practical QKD. Comment: 12 page;3 figures |
| Databáze: | OpenAIRE |
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