Entanglement purification of Gaussian continuous variable quantum states

被引：184
|
作者：
Duan, LM [1 ]
Giedke, G
Cirac, JI
Zoller, P
机构：
[1] Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria
[2] Univ Sci & Technol China, Lab Quantum Commun & Quantum Computat, Hefei 230026, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 17期
关键词：
D O I：
10.1103/PhysRevLett.84.4002
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We describe an entanglement purification protocol to generate maximally entangled states with high efficiencies from two-mode squeezed states or from mixed Gaussian continuous entangled states. The protocol relies on a local quantum nondemolition measurement of the total excitation number of several continuous variable entangled pairs. We propose an optical scheme to do this kind of measurement using cavity enhanced cross-Kerr interactions.
引用
收藏
页码：4002 / 4005
页数：4
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