Quantum key distribution without alternative measurements

被引：91

作者：

Cabello, A ^{[1
]}

机构：

[1] Univ Seville, Dept Fis Aplicada, E-41012 Seville, Spain

来源：

PHYSICAL REVIEW A | 2000年 / 61卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.61.052312

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Entanglement swapping between Einstein-Podolsky-Rosen (EPR) pairs can be used to generate the same sequence of random bits in two remote places. A quantum key distribution protocol based on this idea is described. The scheme exhibits the following features. (a) It does not require that Alice and Bob choose between alternative measurements, therefore improving the rate of generated bits by transmitted qubit. (b) It allows Alice and Bob to generate a key of arbitrary length using a single quantum system (three EPR pairs), instead of a long sequence of them. (c) Detecting Eve requires the comparison of fewer bits. (d) Entanglement is an essential ingredient. The scheme assumes reliable measurements of the Bell operator.

引用

页数：4

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