摘要The existing theory of decoy-state quantum cryptography assumes that the dark count rate is a constant, but in practice there exists fluctuation. We develop a new scheme of the decoy state, achieve a more practical key generation rate in the presence of fluctuation of the dark count rate, and compare the result with the result of the decoy-state without fluctuation. It is found that the key generation rate and maximal secure distance will be decreased under the influence of the fluctuation of the dark count rate.
Abstract：The existing theory of decoy-state quantum cryptography assumes that the dark count rate is a constant, but in practice there exists fluctuation. We develop a new scheme of the decoy state, achieve a more practical key generation rate in the presence of fluctuation of the dark count rate, and compare the result with the result of the decoy-state without fluctuation. It is found that the key generation rate and maximal secure distance will be decreased under the influence of the fluctuation of the dark count rate.
GAO Xiang;SUN Shi-Hai;LIANG Lin-Mei. General Theory of Decoy-State Quantum Cryptography with Dark Count Rate Fluctuation[J]. 中国物理快报, 2009, 26(10): 100307-100307.
GAO Xiang, SUN Shi-Hai, LIANG Lin-Mei. General Theory of Decoy-State Quantum Cryptography with Dark Count Rate Fluctuation. Chin. Phys. Lett., 2009, 26(10): 100307-100307.
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2009, Vol. 26 
