Impossibility of measuring the wave function of a single quantum system

被引：133

作者：

DAriano, GM

Yuen, HP

机构：

[1] NORTHWESTERN UNIV,DEPT PHYS & ASTRON,EVANSTON,IL 60208

[2] DIPARTIMENTO FIS A VOLTA,I-27100 PAVIA,ITALY

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.76.2832

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The general impossibility of determining the state of a single quantum system is proved for arbitrary measuring schemes, including a succession of measurements. Some recently proposed methods are critically examined. A scheme for tomographic measurements on a single copy of a radiation field is devised, showing that the system state is perturbed however weak the system-apparatus interaction is, due to the need of preparing the apparatus in a highly ''squeezed'' state.

引用

页码：2832 / 2835

页数：4

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