[10p-S101-1~7] Recent progress in global quantum cryptography communication

[10p-S101-4] Continuous-Variable Quantum Key Distribution: current status and prospects

〇Takuya Hirano¹ (1.Gakushuin Univ.)

Keywords:quantum key distribution, homodyne detection, continuous variable

Recently there has been an increased interest in Continuous-Variable Quantum Key Distribution (CV-QKD), in which a weak signal light is detected by homodyne detection. One advantage of CV-QKD is that coexistence of QKD with high-speed optical communication is easier because homodyne detection itself works as an efficient filter and it is insensitive to stray light. This feature makes CV-QKD a viable option for low-cost quantum secure communication. In this talk, we will review the present status of CV-QKD, including optical configuration and security analysis, and would like to discuss future prospects for applications in real world.