论文标题
BI-PPT频道正在纠缠破裂
Bi-PPT channels are entanglement breaking
论文作者
论文摘要
在最近的一篇论文中，Hirche和Leditzky引入了BI-PPT通道的概念，BI-PPT通道是量子通道的概念，它们与换位的构成完全正向保持正面，因此，其互补通道之一具有相同的特性。他们询问是否有这样的频道的例子，这些渠道是不可抗衡的。我们表明事实并非如此，因为BI-PPT渠道总是纠缠不清。我们还表明，在与换位的组成下，可降解的量子通道完全呈阳性。
In a recent paper, Hirche and Leditzky introduced the notion of bi-PPT channels which are quantum channels that stay completely positive under composition with a transposition and such that the same property holds for one of their complementary channels. They asked whether there are examples of such channels that are not antidegradable. We show that this is not the case, since bi-PPT channels are always entanglement breaking. We also show that degradable quantum channels staying completely positive under composition with a transposition are entanglement breaking.
