Imprinting complete information about a quantum channel on its output state

被引：78

作者：

D'Ariano, GM

Lo Presti, P

机构：

[1] Quantum Opt & Informat Grp, I-27100 Pavia, Italy

[2] Ist Nazl Fis Mat, Unita Pavia, I-27100 Pavia, Italy

[3] Univ Pavia, Dipartimento Fis A Volta, I-27100 Pavia, Italy

[4] Northwestern Univ, Dept Elect Engn & Comp Sci, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.91.047902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce a novel property of bipartite quantum states, which we call faithfulness, and we say that a state is faithful when acting with a channel on one of the two quantum systems; the output state carries complete information about the channel. The concept of faithfulness can also be extended to sets of states, when the output states altogether carry a complete imprinting of the channel. Measures of degrees of faithfulness are proposed.

引用

页数：4

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