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arXiv quant-ph/0302031quant-phmath-phmath.MP
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一般纠缠打破通道

General Entanglement Breaking Channels

Michael Horodecki, Peter W. Shor, Mary Beth Ruskai

摘要:

本文研究了一类随机映射或通道,它们对纠缠态的作用(当用恒等式张量时)总是产生一个可分态。这样的地图有一个典型的形式介绍Holevo。这样的映射被称为纠缠破缺,并且总是可以用Holevo引入的规范形式来写。考虑了这类映射的一些特殊类,并给出了几个等价刻画。由于破纠缠保迹映射的集合是凸的,所以可以用它的极值点来描述它。在完全正的保迹映射的集合中,唯一也是纠缠破缺的极值点是那些被称为经典量子或CQ的极值点。然而,对于d > 2,纠缠破坏映射的集合具有不是极端CQ映射的额外的极端点。

英文摘要:

This paper studies the class of stochastic maps, or channels, whose action (when tensored with the identity) on an entangled state always yields a separable state. Such maps have a canonical form introduced by Holevo. Such maps are called entanglement breaking, and can always be written in a canonical form introduced by Holevo. Some special classes of these maps are considered and several equivalent characterizations given. Since the set of entanglement-breaking trace-preserving maps is convex, it can be described by its extreme points. The only extreme points of the set of completely positive trace preserving maps which are also entanglement breaking are those known as classical quantum or CQ. However, for d > 2 the set of entanglement breaking maps has additional extreme points which are not extreme CQ maps.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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