Optimal Design and Quantum Benchmarks for Coherent State Amplifiers

被引：34

作者：

Chiribella, Giulio ^{[1
]}

Xie, Jinyu ^{[1
]}

机构：

[1] Tsinghua Univ, Inst Interdisciplinary Informat Sci, Ctr Quantum Informat, Beijing 100084, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 21期

基金：

加拿大自然科学与工程研究理事会; 中国国家自然科学基金;

关键词：

NOISE; AMPLIFICATION; CLONING; LIMIT;

D O I：

10.1103/PhysRevLett.110.213602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We establish the ultimate quantum limits to the amplification of an unknown coherent state, both in the deterministic and probabilistic case, investigating the realistic scenario where the expected photon number is finite. In addition, we provide the benchmark that experimental realizations have to surpass in order to beat all classical amplification strategies and to demonstrate genuine quantum amplification. Our result guarantees that a successful demonstration is in principle possible for every finite value of the expected photon number.

引用

页数：5

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