Optimal cloning of coherent states with a linear amplifier and beam splitters

被引：133

作者：

Braunstein, SL ^{[1
]}

Cerf, NJ

Iblisdir, S

van Loock, P

Massar, S

机构：

[1] Bangor Univ, Bangor LL57 1UT, Gwynedd, Wales

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

[3] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[4] Free Univ Brussels, Serv Phys Theor, B-1050 Brussels, Belgium

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.86.4938

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A transformation achieving the optimal symmetric N --> M cloning of coherent states is presented. Its implementation requires only a phase-insensitive linear amplifier and a network of beam splitters. An experimental demonstration of this continuous-variable cloner should therefore he in the scope of current technology. The link between optimal quantum cloning and optimal amplification of quantum states is also pointed out.

引用

页码：4938 / 4941

页数：4

共 23 条

[1] Quantum-information distributors: Quantum network for symmetric and asymmetric cloning in arbitrary dimension and continuous limit [J].