SYSTEM AND APPARATUSES FOR MEASUREMENT-DEVICE-INDEPENDENT QUANTUM KEY DISTRIBUTION

摘要

Embodiments of the invention provide a chip-based system and apparatuses for measurement-device-independent (MDI) quantum key distribution (QKD). The system comprises two transmitters and a receiver, wherein each of the two transmitters is communicably connectable to the receiver and comprises a first modulator, a second modulator, and a third modulator which are integrated onto a silicon photonic chip, wherein: the first modulator is configured to receive input laser pulses from a laser source and generate signal states and decoy states by modifying laser intensity of the received input laser pulses; the second modulator is configured to implement random phase modulations of the signal states and the decoy states generated by the first modulator, and the third modulator is configured to generate polarization states based on the signal states and the decoy states modulated by the second modulator.