Quantum key distribution secure against the efficiency loophole

Details Quantum key distribution secure against the efficiency loophole Quantum key distribution secure against the efficiency loophole

2008-12-22

arxiv.org/abs/0812.4301v1

Physics

Quantum Physics

5 pages, 2 figures

Scientific paper

An efficiency-loophole-free quantum key distribution (QKD) scheme is proposed, which involves no hardware change but a modification in the data post-processing step. The scheme applies to a generic class of detection systems which allow correlations between the detection efficiency and the outcomes. We study the system transmittance and the detection error rate that allow implementing this scheme. We also consider the case that a quantum memory is used to boost the performance and investigate the criteria of the readout probability. The simulation result shows that the lowest tolerable system transmittance (readout probability) is 50%, while the necessary efficiency for an efficiency-loophole-free Bell's inequality test is 82.8%.

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