Plug-and-play measurement-device-independent quantum key distribution
- Plug-and-play measurement-device-independent quantum key distribution
- 최유준; 권오성; 우민기; 오경환; 한상욱; 김용수; 문성욱
- 양자암호; 양자키분배; 양자정보
- Issue Date
- Physical review. A
- VOL 93, 032319-032319
- Quantum key distribution (QKD) guarantees unconditional communication security based on the laws of quantum physics. However, practical QKD suffers from a number of quantum hackings due to the device imperfections. From the security standpoint, measurement-device-independent quantum key distribution (MDI-QKD) is in the limelight since it eliminates all the possible loopholes in detection. Due to active control units for mode matching between the photons from remote parties, however, the implementation of MDI-QKD is highly impractical. In this paper, we propose a method to resolve the mode matching problem while minimizing the use of active control units. By introducing the plug-and-play (P&P) concept into MDI-QKD, the indistinguishability in spectral and polarization modes between photons can naturally be guaranteed. We show the feasibility of P&P MDI-QKD with a proof-of-principle experiment.
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