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首页> 外文期刊>Physical Review, A. Atomic, molecular, and optical physics >Channel capacities versus entanglement measures in multiparty quantum states
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Channel capacities versus entanglement measures in multiparty quantum states

机译:多方量子态中的通道容量与纠缠度

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For quantum states of two subsystems, highly entangled states have a higher capacity of transmitting classical as well as quantum information, and vice versa. We show that this is no more the case in general: Quantum capacities of multiaccess channels, motivated by communication in quantum networks, do not have any relation with genuine multiparty entanglement measures. Importantly, the statement is demonstrated for arbitrary multipartite entanglement measures. Along with revealing the structural richness of multiaccess channels, this gives us a tool to classify multiparty quantum states from the perspective of its usefulness in quantum networks, which cannot be visualized by any genuine multiparty entanglement measure.
机译:对于两个子系统的量子态,高度纠缠的态具有传输经典信息和量子信息的能力,反之亦然。我们证明,通常情况不再如此:由于量子网络中的通信而激发的多路访问通道的量子容量与真正的多方纠缠措施没有任何关系。重要的是,该声明已证明适用于任意多部分纠缠措施。除了揭示多路访问通道的结构丰富性之外,这还为我们提供了一种从多方量子状态在量子网络中的有用性的角度对其进行分类的工具,而任何真正的多方纠缠措施都无法将其可视化。

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