Utilizing a six-qubit cluster state as quantum channel, a bidirectional controlled quantum teleportation (BCQT) scheme was put forward by Yan in [Int. J. Theor. Phys. 52, 3870 (2013)]. However, in order to accomplish the task, two agents must cooperate to perform a quantum controlled phase gate operation on their two qubits. In view of the present technique, such kind of remote joint operation is difficult to be realized. In this paper, based on the same cluster state, we propose a different BCQT scheme to avoid the remote joint operation. Besides, an unnecessary waste of classical messages in Yan’s scheme is point out.

中文翻译：

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使用六量子比特簇状态的双向量子控制隐形传态，无需远程联合操作

Yan 在 [Int. J.理论。物理。52, 3870 (2013)]。然而，为了完成任务，两个代理必须合作在他们的两个量子位上执行量子控制的相位门操作。鉴于目前的技术，这种远程联合操作是难以实现的。在本文中，基于相同的集群状态，我们提出了一种不同的BCQT方案来避免远程联合操作。此外，还指出了严的方案中对经典信息的不必要浪费。