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Detector-Device-Independent Quantum Key Distribution

Recently, a quantum key distribution (QKD) scheme based on entanglement swapping, called measurement-device-independent QKD (mdiQKD), was proposed to bypass all detector side-channel attacks. While mdiQKD is conceptually elegant and offers a supreme level of security, the experimental complexity is challenging for practical systems. For instance, it requires interference between two widely separated independent single-photon sources, and the rates are dependent on detecting two photons - one from each source. Here we experimentally demonstrate a QKD scheme that removes the need for a two-photon system and instead uses the idea of a two-qubit single-photon (TQSP) to significantly simplify the implementation and improve the efficiency of mdiQKD in several aspects.

preprint2014arXivOpen access
Charles Ci Wen LimBoris KorzhAnthony MartinFelix BussieresRob ThewHugo Zbinden
quant-ph
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Open access6 authors1 topic
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Charles Ci Wen LimBoris KorzhAnthony MartinFelix BussieresRob ThewHugo Zbinden

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