Coherent-state phase concentration by quantum probabilistic amplification

被引：82
|
作者：
Marek, Petr [1 ]
Filip, Radim [1 ]
机构：
[1] Palacky Univ, Dept Opt, CZ-77146 Olomouc, Czech Republic
来源：
PHYSICAL REVIEW A | 2010年 / 81卷 / 02期
关键词：
PHOTONS; NOISE;
D O I：
10.1103/PhysRevA.81.022302
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a probabilistic measurement-induced amplification for coherent states. The amplification scheme uses a counterintuitive architecture: a thermal noise addition (instead of a single-photon addition) followed by a feasible multiple-photon subtraction using a realistic photon-number-resolving detector. It allows one to substantially amplify weak coherent states and simultaneously reduce their phase uncertainty, which is impossible when using a deterministic Gaussian amplifier.
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页数：5
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