Quantum amplifiers, quantum duplicators and quantum cryptography

Quantum amplifiers, quantum duplicators and quantum cryptography
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DOI:
10.1088/1355-5111/8/4/015
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发表时间:
1996-08
期刊:
Quantum and Semiclassical Optics: Journal of The European Optical Society Part B
影响因子:
--
通讯作者:
H. Yuen
H. Yuen
中科院分区:
其他
文献类型:
--
作者:
H. Yuen

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分析了几种用于窃听标准四相干态量子密码系统的方法以及可能的对策,发现与窃听者相比,窃听者对用户的可容忍能量缺点有限制。指出了光子数放大器和光子数复制器可能的重要作用。
Several methods for eavesdropping on the standard four coherent-state quantum cryptosystem together with a possible countermeasure are analysed and found to place a limit on the tolerable energy disadvantage of the users as compared to the eavesdropper. The possible significant role of the photon-number amplifier and the photon-number duplicator is indicated.