Balancing four-state continuous-variable quantum key distribution with linear optics cloning machine

• 来源期刊: 中国物理B（英文版）
• 关键词: four states linear optics cloning machine quantum key distribution
• 年，卷（期）: 2017,（11）
• 页码范围: 97-103
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/1674-1056/26/11/110304

摘要

We show that the secret key generation rate can be balanced with the maximum secure distance of four-state continuous-variable quantum key distribution (CV-QKD) by using the linear optics cloning machine (LOCM).Benefiting from the LOCM operation,the LOCM-tuned noise can be employed by the reference partner of reconciliation to achieve higher secret key generation rates over a long distance.Simulation results show that the LOCM operation can flexibly regulate the secret key generation rate and the maximum secure distance and improve the performance of four-state CV-QKD protocol by dynamically tuning parameters in an appropriate range.