论文标题
在Alberti-Uhlmann的Unital频道条件下
On the Alberti-Uhlmann Condition for Unital Channels
论文作者
论文摘要
我们解决了两组密度矩阵之间存在完全积极迹线（CPTP）图的问题。我们完善了阿尔伯蒂和乌尔曼的结果，并得出了在两对量子状态之间存在一个Unital通道的必要条件，最终归结为三个简单的不等式。
We address the problem of existence of completely positive trace preserving (CPTP) maps between two sets of density matrices. We refine the result of Alberti and Uhlmann and derive a necessary and sufficient condition for the existence of a unital channel between two pairs of qubit states which ultimately boils down to three simple inequalities.
