Experimentally feasible purification of continuous-variable entanglement

被引：25

作者：

Fiurasek, Jaromir

Marek, Petr

Filip, Radim

Schnabel, Roman

机构：

[1] Palacky Univ, Dept Opt, Olomouc 77200, Czech Republic

[2] Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland

[3] Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-30167 Hannover, Germany

[4] Leibniz Univ Hannover, D-30167 Hannover, Germany

来源：

PHYSICAL REVIEW A | 2007年 / 75卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.75.050302

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a scheme for purification and distillation of squeezed and entangled continuous-variable states of light transmitted through a channel exhibiting phase fluctuations. The outstanding advantage of the suggested protocol is its experimental feasibility since it only involves an interference of two copies of the decohered state on a balanced beam splitter, a homodyne measurement on one of the output beams, and a conditioning on the measurement outcome. The purification can counteract the detrimental effects of phase fluctuations in optical quantum-communication networks.

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页数：4

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