| Autor: |
Jun-Lin Bai, Yuan-Mei Xie, Zhao Li, Hua-Lei Yin, Zeng-Bing Chen |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Optics Express. 30:28865 |
| ISSN: |
1094-4087 |
| Popis: |
Twin-field interference-based quantum conference key agreement protocols have been proposed and have achieved good performance in terms of the key rate and transmission distance in the finite-key regime. However, its performance significantly decreases when the strict constraint is broken regarding the optical pulse intensity and probability. Here, we propose a post-matching QCKA protocol to remove this constraint while obtaining a higher key rate. Numerical results in the symmetric case show that our protocol can obtain a transmission distance 25% more than the previous asymmetric QCKA protocol when the decoy state optical pulse intensity is 1% higher than the ideal value of the constraint, and can obtain a transmission distance 100% higher when the decoy state optical pulse intensity is 10% higher than the ideal value of the constraint. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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