论文标题
最佳测量保存量子频道
Optimal measurement preserving qubit channels
论文作者
论文摘要
我们考虑通过量子通道发送的Qubit状态的问题，并得出了由通道保留最佳测量的必要条件。我们将结果应用于给定量子集合的最佳测量保留（OPP）通道的表征，例如，一组两个状态或一组具有等先验概率的多个量子状态。相反，我们还表征了给定通道为OMP的量子组合，例如单一和去极化通道。最后，我们展示了如何构建给定集合的OMP频道集。
We consider the problem of discriminating qubit states that are sent over a quantum channel and derive a necessary and sufficient condition for an optimal measurement to be preserved by the channel. We apply the result to the characterization of optimal measurement preserving (OMP) channels for a given qubit ensemble, e.g., a set of two states or a set of multiple qubit states with equal a priori probabilities. Conversely, we also characterize qubit ensembles for which a given channel is OMP, such as unitary and depolarization channels. Finally, we show how the sets of OMP channels for a given ensemble can be constructed.
