The 82nd JSAP Autumn Meeting 2021

Presentation information

Symposium (Oral)

Symposium » Recent progress in global quantum cryptography communication

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

Fri. Sep 10, 2021 1:30 PM - 5:15 PM S101 (Oral)

Satoshi Iwamoto(Univ. of Tokyo), Hideo Kosaka(Yokohama Natl. Univ.)

3:00 PM - 3:30 PM

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

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.