Noncommuting mixed states cannot be broadcast

被引：449

作者：

Barnum, H

Caves, CM

Fuchs, CA

Jozsa, R

Schumacher, B

机构：

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

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

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.76.2818

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that, given a general mixed state for a quantum system, there are no physical means for broadcasting that state onto two separate quantum systems, even when the state need only be reproduced marginally on the separate systems. This result extends the standard no-cloning theorem for pure states.

引用

页码：2818 / 2821

页数：4

共 11 条

[1] QUANTUM CRYPTOGRAPHY USING ANY 2 NONORTHOGONAL STATES [J].