QUANTUM CRYPTOGRAPHY USING ANY 2 NONORTHOGONAL STATES

被引:2385
作者
BENNETT, CH
机构
[1] IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights
关键词
D O I
10.1103/PhysRevLett.68.3121
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Quantum techniques for key distribution-the classically impossible task of distributing secret information over an insecure channel whose transmissions are subject to inspection by an eavesdropper, between parties who share no secret initially-have been proposed using (a) four nonorthogonally polarized single-photon states or low-intensity light pulses, and (b) polarization-entangled or spacetime-entangled two-photon states. Here we show that in principle any two nonorthogonal quantum states suffice, and describe a practical interferometric realization using low-intensity coherent light pulses.
引用
收藏
页码:3121 / 3124
页数:4
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