4:00 PM - 4:15 PM
[20p-A404-12] Proposal of Differential-Phase-Shift Twin-Field Quantum Key Distribution
Keywords:quantum key distribution, differential phase shift, long distance transmission
Twin-Field Quantum Key Distribution (TF-QKD) has been studied as a QKD protocol for long distance. In this presentation, we propose Differential-Phase-Shift (DPS)-TF-QKD, which is based on the idea of DPS-QKD.
Its security is similar to DPS-QKD, and it is robust against photon number splitting attack without a decoy method.
We calculate the system performance assuming typical eavesdropping, and show that the key generation rate is proportional to the square root of the transmission transmissivity.
Alice and Bob send a weak coherent pulse train with {0,π} phase and an interval of T to Charlie located in the middle between them, who measures the pulses through a delay interferometer with a delay time of T/2.
Its security is similar to DPS-QKD, and it is robust against photon number splitting attack without a decoy method.
We calculate the system performance assuming typical eavesdropping, and show that the key generation rate is proportional to the square root of the transmission transmissivity.
Alice and Bob send a weak coherent pulse train with {0,π} phase and an interval of T to Charlie located in the middle between them, who measures the pulses through a delay interferometer with a delay time of T/2.