General fidelity limit for quantum channels

被引：54

作者：

Barnum, H

Fuchs, CA

Jozsa, R

Schumacher, B

机构：

[1] UNIV MONTREAL, DEPT IRO, MONTREAL, PQ H3C 3J7, CANADA

[2] UNIV PLYMOUTH, SCH MATH & STAT, PLYMOUTH PL4 8AA, DEVON, ENGLAND

[3] KENYON COLL, DEPT PHYS, GAMBIER, OH 43022 USA

来源：

PHYSICAL REVIEW A | 1996年 / 54卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.54.4707

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We derive a general limit on the fidelity of a quantum channel conveying an ensemble of pure states. Unlike previous results, this limit applies to arbitrary coding and decoding schemes. This establishes in full generality the quantum noiseless coding theorem, formerly obtained only for the special case of unitary decoding schemes.

引用

页码：4707 / 4711

页数：5

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