We analyze Kadison-Schwarz approximation to positive maps in matrix algebras. This is an analogue of the well known structural physical approximation to positive maps used in entanglement theory. We study several known maps both decomposable (like transposition) and non-decomposable (like Choi map and its generalizations).

中文翻译：

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关于正映射的 Kadison-Schwarz 逼近

我们分析了矩阵代数中正映射的 Kadison-Schwarz 逼近。这类似于纠缠理论中使用的正映射的众所周知的结构物理近似。我们研究了几种已知的可分解（如转置）和不可分解（如 Choi 地图及其概括）的地图。