Universal quantum observables

被引：25

作者：

D'Ariano, GM

机构：

[1] Univ Pavia, INFM, Quantum Opt & Informat Grp, I-27100 Pavia, Italy

[2] Northwestern Univ, Dept Elect & Comp Engn, Evanston, IL 60208 USA

来源：

PHYSICS LETTERS A | 2002年 / 300卷 / 01期

关键词：

D O I：

10.1016/S0375-9601(02)00752-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It is shown how one can estimate the ensemble average of all operators of a quantum system by measuring only one fixed "universal" observable on an extended Hilbert space. This is equivalent to run a tomographic reconstruction in a kind of "quantum parallelism", measuring all the quorum observables with a single universal observable. An experimental implementation in quantum optics is given, based on Kerr cross-phase modulated homodyning. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1 / 6

页数：6

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