Passive Decoy State Quantum Key Distribution

@inproceedings{Curty2009PassiveDS,
  title={Passive Decoy State Quantum Key Distribution},
  author={Marcos Curty and Tobias Moroder and Xiongfeng Ma and Norbert L{\"u}tkenhaus},
  booktitle={QuantumComm},
  year={2009}
}
The use of decoy states enhances the performance of practical quantum key distribution systems significantly by monitoring the quantum channel in a more detailed way. While active modulation of the intensity of the pulses is an effective way of preparing decoy states in principle, in practice passive preparation might be desirable in some scenarios. Known passive methods involve parametric down-conversion. In this paper we show how phase randomized coherent states can be used for the same… CONTINUE READING
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