Optimal quantum cloning machines

被引：618

作者：

Gisin, N ^{[1
]}

Massar, S ^{[1
]}

机构：

[1] TEL AVIV UNIV,RAYMOND & BEVERLY SACKLER FAC EXACT SCI,SCH PHYS & ASTRON,IL-69978 TEL AVIV,ISRAEL

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.79.2153

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present quantum cloning machines that transform N identical qubits into M > N identical copies and we prove that the fidelity (quality) of these copies is optimal. The connection between cloning and measurement is discussed in detail. When the number of clones M tends towards infinity, the fidelity of each clone tends towards the optimal fidelity that can be obtained by a measurement on the input qubits. More generally, quantum cloning machines are universal devices to translate quantum information into classical information.

引用

页码：2153 / 2156

页数：4

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