Economical phase-covariant cloning of qudits

被引：79

作者：

Buscemi, F ^{[1
]}

D'Ariano, GM ^{[1
]}

Macchiavello, C ^{[1
]}

机构：

[1] Univ Pavia, Dipartimento Fis A Volta, QUIT Grp, I-27100 Pavia, Italy

来源：

PHYSICAL REVIEW A | 2005年 / 71卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.71.042327

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We derive the optimal N -> M phase-covariant quantum cloning for equatorial states in dimension d with M=kd+N, k integer. The cloning maps are optimal for both global and single-qudit fidelity. The map is achieved by an "economical" cloning machine, which works without ancilla.

引用

页数：7

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