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- W770517866 abstract "The security of quantum key distribution (QKD) relies on the Heisenberg uncertainty principle, with which legitimate users are able to estimate information leakage by monitoring the disturbance of the transmitted quantum signals. Normally, the disturbance is reflected as bit flip errors in the sifted key; thus, privacy amplification, which removes any leaked information from the key, generally depends on the bit error rate. Recently, a round-robin differential-phase-shift QKD protocol for which privacy amplification does not rely on the bit error rate [Nature 509, 475 (2014)] was proposed. The amount of leaked information can be bounded by the sender during the state-preparation stage and hence, is independent of the behaviour of the unreliable quantum channel. Considering the essence of this protocol, we present a tight bound on the key rate and employ a decoy-state method. The effects of background noise and misalignment are taken into account under practical conditions. Our simulation results show that the protocol can tolerate channel error rates of close to 50% within a typical experiment setting. That is, there is no restriction on the error rate in practice." @default.
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- W770517866 date "2015-05-11" @default.
- W770517866 modified "2023-09-27" @default.
- W770517866 title "Round-robin differential-phase-shift quantum key distribution" @default.
- W770517866 hasPublicationYear "2015" @default.
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