Presentation Information
[23p-A601-2]Proposal of Twin-Field Quantum Key Distribution Using Delayed Interferometer
〇Aoki Sasahara1, Kyo Inoue1, Toshimori Honjo2 (1.Osaka univ., 2.NTT Basic Research Lab.)
Keywords:
quantum key distribution,tiwn field,delayed interferometer
Twin-Field Quantum Key Distribution (TF-QKD) is a QKD protocol that enables a long QKD distance. This paper proposes a novel TF-QKD scheme, where Alice and Bob send weak coherent pulse trains with phases of and a time interval of T to Charlie located in the middle between them, who receives the pulses through a delay interferometer with a delay time of T/2.
The proposed scheme features the robustness against photon number splitting attack, requiring no decoy method and resulting in a high key creation efficiency.
We calculated the system performance assuming typical eavesdropping, and showed that the key generation rate is proportional to the square root of the transmission transmissivity.
The proposed scheme features the robustness against photon number splitting attack, requiring no decoy method and resulting in a high key creation efficiency.
We calculated the system performance assuming typical eavesdropping, and showed that the key generation rate is proportional to the square root of the transmission transmissivity.