Entanglement-Breaking Channels in Infinite Dimensions

被引：99
作者：
Holevo, A. S. [1 ]
机构：
[1] RAS, Steklov Math Inst, Moscow, Russia
来源：
PROBLEMS OF INFORMATION TRANSMISSION | 2008年 / 44卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/S0032946008030010
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
In the first part of the paper we give a representation for entanglement-breaking channels in separable Hilbert space that generalizes the "Kraus decomposition with rank-one operators" and use it to describe complementary channels. We also note that coherent information for antidegradable channel is always nonpositive. In the second part, we give necessary and sufficient condition for entanglement breaking for the general quantum Gaussian channel. Application of this condition to one-mode channels provides several new cases where the additivity conjecture holds in the strongest form.
引用
收藏
页码：171 / 184
页数：14
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