Phase-covariant quantum cloning of qudits

被引：106

作者：

Fan, H ^{[1
]}

Imai, H ^{[1
]}

Matsumoto, K ^{[1
]}

Wang, XB ^{[1
]}

机构：

[1] Japan Sci & Technol Corp, ERATO, Quantum Computat & Quantum Informat Project, Bunkyo Ku, Tokyo 1330033, Japan

来源：

PHYSICAL REVIEW A | 2003年 / 67卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.67.022317

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the phase-covariant quantum cloning machine for qudits, i.e., the input states in a d-level quantum system have complex coefficients with arbitrary phase but constant module. A cloning unitary transformation is proposed. After optimizing the fidelity between input state and single qudit reduced density operator of output state, we obtain the optimal fidelity for 1 to 2 phase-covariant quantum cloning of qudits and the corresponding cloning transformation.

引用

页数：5

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