OPTIMAL DETECTION OF QUANTUM INFORMATION

被引：271

作者：

PERES, A

WOOTTERS, WK

机构：

[1] UNIV CALIF LOS ALAMOS SCI LAB, CTR NONLINEAR STUDIES, LOS ALAMOS, NM 87545 USA

[2] TECHNION ISRAEL INST TECHNOL, DEPT PHYS, HAIFA, ISRAEL

[3] WILLIAMS COLL, DEPT PHYS, WILLIAMSTOWN, MA 01267 USA

[4] UNIV CALIF LOS ALAMOS SCI LAB, DIV THEORET, LOS ALAMOS, NM 87545 USA

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.66.1119

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Two quantum systems are identically prepared in different locations. An observer's task is to determine their state. A simple example shows that a pair of measurements of the von Neumann type is less effective than a sequence of nonorthogonal probability-operator measures, alternating between the two quantum systems. However, the most efficient set of operations of that type that we were able to design falls short of a single combined measurement, performed on both systems together.

引用

页码：1119 / 1122

页数：4

共 16 条

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