In a local quantum network, multi-qubits in various entangled states might be distributed in different remote nodes due to some peculiar demands. In this paper we consider a seven-qubit entangled state in a given qubit distribution among three participants and study its capacity in quantum teleportation (QT). To be specific, we put forward three controlled QT schemes utilizing the state. In each scheme QT can be deterministically and bidirectionally realized between two participants with another as the controller.

中文翻译：

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最大七量子纠缠态的循环确定性双向量子控制隐形传态

在局部量子网络中，由于某些特殊需求，处于各种纠缠态的多量子位可能分布在不同的远程节点中。在本文中，我们考虑了三个参与者在给定的量子位分布中的七量子位纠缠态，并研究了其在量子隐形传态（QT）中的能力。具体来说，我们利用状态提出了三种受控的QT方案。在每种方案中，QT可以在两个参与者之间以确定性和双向方式实现，另一个参与者作为控制器。