Accessible information in combined and sequential quantum measurements on a binary-state signal

被引：29

作者：

Ban, M

Yamazaki, K

Hirota, O

机构：

[1] TAMAGAWA UNIV, DEPT INFORMAT & COMMUN, MACHIDA, TOKYO 194, JAPAN

[2] TAMAGAWA UNIV, RES CTR QUANTUM COMMUN, MACHIDA, TOKYO 194, JAPAN

来源：

PHYSICAL REVIEW A | 1997年 / 55卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.55.22

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The accessible information obtained in combined and sequential quantum measurements is calculated for a binary pure quantum state signal. It is shown that the accessible information obtained in the combined measurement is equal to that obtained in the sequential measurement. The result indicates that the conjecture by Peres and Wootters [Phys. Rev. Lett. 66, 1119 (1991)] is not valid, at least for a binary quantum state signal. Furthermore, the result is compared with that obtained by Brody and Meister [Phys. Rev. Lett. 76, 1 (1996)].

引用

页码：22 / 26

页数：5

共 10 条

[1] Upper bound of the accessible information and lower bound of the Bayes cost in quantum signal-detection processes [J].