论文标题
最佳量子通道
Optimal quantum channels
论文作者
论文摘要
开发了一种优化量子通道成本的方法。目的是确定最便宜的渠道，该渠道为给定的一组输入状态产生规定的输出状态。这本质上是最佳传输的量子版本。为了将明确的概念含义带到成本上，从我们所说的基本过渡方面查看了渠道，这与经典系统之间的点对点过渡类似。强调纠缠在优化成本中的作用。我们还展示了如何将我们的方法应用于理论上搜索系统状态上执行规定任务的频道，同时否则会尽可能少地打扰状态。
A method to optimize the cost of a quantum channel is developed. The goal is to determine the cheapest channel that produces prescribed output states for a given set of input states. This is essentially a quantum version of optimal transport. To attach a clear conceptual meaning to the cost, channels are viewed in terms of what we call elementary transitions, which are analogous to point-to-point transitions between classical systems. The role of entanglement in optimization of cost is emphasized. We also show how our approach can be applied to theoretically search for channels performing a prescribed set of tasks on the states of a system, while otherwise disturbing the state as little as possible.
