论文标题
基于多部分的传送 - 大量量子信息传播
Multiport based teleportation -- transmission of a large amount of quantum information
论文作者
论文摘要
我们一口气分析了传输许多未知量子状态或一个复合系统的问题。我们在纠缠忠诚度中测得的这种过程的性能得出了一个下限。获得的界限是有效的计算，并且胜过针对基于端口的协议的预先存在的变体计算的纠缠保真度的明确值，从而允许传送大量量子信息。还讨论了与确切公式的比较和概率方案的类似分析。特别是，我们介绍了纠缠忠诚度的闭合形式表达式以及在旋转角动量图中量子案例中概率方案中成功的概率。
We analyse the problem of transmitting a number of unknown quantum states or one composite system in one go. We derive a lower bound on the performance of such process, measured in the entanglement fidelity. The obtained bound is effectively computable and outperforms the explicit values of the entanglement fidelity calculated for the pre-existing variants of the port-based protocols, allowing for teleportation of a much larger amount of quantum information. The comparison with the exact formulas and similar analysis for the probabilistic scheme is also discussed. In particular, we present the closed-form expressions for the entanglement fidelity and for the probability of success in the probabilistic scheme in the qubit case in the picture of the spin angular momentum.
