Decoy-state quantum key distribution with large random errors of light intensity
نویسندگان
چکیده
منابع مشابه
Decoy state quantum key distribution.
There has been much interest in quantum key distribution. Experimentally, quantum key distribution over 150 km of commercial Telecom fibers has been successfully performed. The crucial issue in quantum key distribution is its security. Unfortunately, all recent experiments are, in principle, insecure due to real-life imperfections. Here, we propose a method that can for the first time make most...
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Experimental weak + vacuum protocol has been demonstrated using commercial QKD system based on a standard bi-directional ‘Plug & Play’ set-up. By making simple modifications to a commercial quantum key distribution system, decoy state QKD allows us to achieve much better performance than QKD system without decoy state in terms of key generation rate and distance. We demonstrate an unconditional...
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Decoy states have recently been proposed as a useful method for substantially improving the performance of quantum key distribution QKD . Here, we present a general theory of the decoy state protocol based on only two decoy states and one signal state. We perform optimization on the choice of intensities of the two decoy states and the signal state. Our result shows that a decoy state protocol ...
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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...
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We propose a quantum key distribution scheme that combines a biased basis choice with the decoy-state method. In this scheme, Alice sends all signal states in the Z basis and decoy states in the X and Z basis with certain probabilities, and Bob measures received pulses with optimal basis choice. This scheme simplifies the system and reduces the random number consumption. From the simulation res...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2007
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.75.052301