Operational advantages provided by nonclassical teleportation
Operational advantages provided by nonclassical teleportation
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DOI：
10.1103/physrevresearch.2.023029
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发表时间：
2019-08
影响因子：
4.2
通讯作者：
Patryk Lipka-Bartosik;Paul Skrzypczyk
中科院分区：
文献类型：
--
作者：
Patryk Lipka-Bartosik;Paul Skrzypczyk
隐形传态的标准基准是隐形传态的平均保真度，根据这个基准，并不是所有的状态都对隐形传态有用。然而，最近的研究表明，所有的纠缠态都会导致非经典的隐形传态，没有经典的方案能够复制传送给鲍勃的状态。在这里，我们研究这一结果的业务意义。一方面，我们证明了每一个纠缠态是有用的隐形传态，如果被认为是一个广义的平均保真度的隐形传态的量子关联。另一方面，我们显示了一个特定的纠缠态和纠缠测量的隐形传态的强度-作为量化的鲁棒性的隐形传态-精确地表征他们的能力，提供一个优势的子信道歧视的任务与边信息。这种联系使我们能够证明，在这个鉴别任务中，每个纠缠态在充当量子存储器时都优于所有可分离态。最后，在一个资源理论的范围内的隐形传态，我们表明，考虑的两个操作任务提供完整的套单调的两个偏序的基础上的概念的隐形传态模拟，一个经典的，和一个量子。
The standard benchmark for teleportation is the average fidelity of teleportation and according to this benchmark not all states are useful for teleportation. It was recently shown however that all entangled states lead to non-classical teleportation, with there being no classical scheme able to reproduce the states teleported to Bob. Here we study the operational significance of this result. On the one hand we demonstrate that every entangled state is useful for teleportation if a generalization of the average fidelity of teleportation is considered which concerns teleporting quantum correlations. On the other hand, we show the strength of a particular entangled state and entangled measurement for teleportation -- as quantified by the robustness of teleportation -- precisely characterizes their ability to offer an advantage in the task of subchannel discrimination with side information. This connection allows us to prove that every entangled state outperforms all separable states when acting as a quantum memory in this discrimination task. Finally, within the context of a resource theory of teleportation, we show that the two operational tasks considered provide complete sets of monotones for two partial orders based upon the notion of teleportation simulation, one classical, and one quantum.