Entanglement is not necessary for perfect discrimination between unitary operations

被引：90

作者：

Duan, Runyao ^{[1
]}

Feng, Yuan ^{[1
]}

Ying, Mingsheng ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Comp Sci & Technol, State Key Lab Intelligent Technol & Syst, Beijing 100084, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.98.100503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that a unitary operation (quantum circuit) secretly chosen from a finite set of unitary operations can be determined with certainty by sequentially applying only a finite amount of runs of the unknown circuit. No entanglement or joint quantum operations are required in our scheme. We further show that our scheme is optimal in the sense that the number of the runs is minimal when discriminating only two unitary operations.

引用

页数：4

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