Weak values of a quantum observable and the cross-Wigner distribution

被引：11

作者：

de Gosson, Maurice A. ^{[1
]}

de Gosson, Serge M. ^{[2
]}

机构：

[1] Univ Vienna, Fac Math, NuHAG, A-1090 Vienna, Austria

[2] Swedish Social Insurance Agcy, Dept Anal & Forecasts, S-10351 Stockholm, Sweden

来源：

PHYSICS LETTERS A | 2012年 / 376卷 / 04期

关键词：

Weak values; Weak measurements; Wigner distribution; Interference; PHASE-SPACE; ELEMENTS; REALITY;

D O I：

10.1016/j.physleta.2011.11.007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the weak values of a quantum observable from the point of view of the Wigner formalism. The main actor here is the cross-Wigner transform of two functions, which is in disguise the cross-ambiguity function familiar from radar theory and time-frequency analysis. It allows us to express weak values using a complex probability distribution. We suggest that our approach seems to confirm that the weak value of an observable is, as conjectured by several authors, due to the interference of two wavefunctions, one coming from the past, and the other from the future. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：293 / 296

页数：4

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