Cloning of continuous quantum variables

被引：204

作者：

Cerf, NJ

Ipe, A

Rottenberg, X

机构：

[1] Free Univ Brussels, Ecole Polytech, B-1050 Brussels, Belgium

[2] CALTECH, Jet Prop Lab, Informat & Comp Technol Res Sect, Pasadena, CA 91109 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.85.1754

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The cloning of quantum variables with continuous spectra is analyzed. A Gaussian quantum cloning machine is exhibited that copies equally well the states of two conjugate variables such as position and momentum. It also duplicates all coherent states with a fidelity of 2/3. More generally, the copies are shown to obey a no-cloning Heisenberg-like uncertainty relation.

引用

收藏

页码：1754 / 1757

页数：4

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