Wang Zhan-Yun, Gou Yi-Tao, Hou Jin-Xing, Cao Li-Ke, Wang Xiao-Hui
School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China.
School of Physics, Northwest University, Xi'an 710127, China.
Entropy (Basel). 2019 Apr 1;21(4):352. doi: 10.3390/e21040352.
We explicitly present a generalized quantum teleportation of a two-qubit entangled state protocol, which uses two pairs of partially entangled particles as quantum channel. We verify that the optimal probability of successful teleportation is determined by the smallest superposition coefficient of these partially entangled particles. However, the two-qubit entangled state to be teleported will be destroyed if teleportation fails. To solve this problem, we show a more sophisticated probabilistic resumable quantum teleportation scheme of a two-qubit entangled state, where the state to be teleported can be recovered by the sender when teleportation fails. Thus the information of the unknown state is retained during the process. Accordingly, we can repeat the teleportion process as many times as one has available quantum channels. Therefore, the quantum channels with weak entanglement can also be used to teleport unknown two-qubit entangled states successfully with a high number of repetitions, and for channels with strong entanglement only a small number of repetitions are required to guarantee successful teleportation.
我们明确提出了一种两比特纠缠态协议的广义量子隐形传态，它使用两对部分纠缠粒子作为量子通道。我们验证了成功隐形传态的最优概率由这些部分纠缠粒子的最小叠加系数决定。然而，如果隐形传态失败，要被隐形传态的两比特纠缠态将会被破坏。为了解决这个问题，我们展示了一种更复杂的两比特纠缠态概率可恢复量子隐形传态方案，当隐形传态失败时，发送者可以恢复要被隐形传态的状态。因此，未知态的信息在这个过程中得以保留。相应地，我们可以根据可用量子通道的数量尽可能多地重复隐形传态过程。所以，弱纠缠的量子通道也可以通过大量重复成功地隐形传态未知的两比特纠缠态，而对于强纠缠通道，只需要少量重复就能保证成功隐形传态。
