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Quantum teleportation through atmospheric channels

机译:通过大气渠道的量子传送

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摘要

We study the Kimble-Braunstein continuous-variable quantum teleportation with the quantum channel physically realized in the turbulent atmosphere. In this context, we examine the applicability of different strategies preserving the Gaussian entanglement (Bohmann et al 2016 Phys. Rev. A 94 010302(R)) for improving the fidelity of the coherent-state teleportation. First, we demonstrate that increasing the squeezing parameter characterizing the entangled state is restricted by its optimal value, which we derive for realistic experimentally-verified examples. Further, we consider the technique of adaptive correlations of losses and show its performance for channels with large squeezing parameters. Finally, we investigate the efficiencies of postselection strategies in dependence on the stochastic properties of the channel transmittance.
机译:我们研究了与湍流气氛中物理上实现的量子通道的亮相 - Braunstein连续变量传送。 在这种情况下,我们研究了不同策略保留高斯纠缠的适用性(Bohmann等,2016年。Rev. A 94 010302(R)),用于提高连贯状态传送的保真度。 首先,我们证明了表征纠缠州的挤压参数的增加受其最佳价值的限制,我们得到了现实的实验验证的例子。 此外,我们考虑了损耗的自适应相关性的技术,并显示了具有大挤压参数的通道的性能。 最后,我们研究了近期选择策略的效率,依赖于通道透射率的随机性能。

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