Quantum teleportation through atmospheric channels
Quantum teleportation through atmospheric channels
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DOI：
10.1088/1402-4896/ab36e0
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发表时间：
2019-01
期刊：
影响因子：
2.9
通讯作者：
K. Hofmann;A. Semenov;W. Vogel;M. Bohmann
中科院分区：
文献类型：
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作者：
K. Hofmann;A. Semenov;W. Vogel;M. Bohmann
研究了在湍流大气中物理实现量子通道的Kimble-Braunstein连续变量量子隐形传态。在这种情况下，我们研究了保留高斯纠缠的不同策略的适用性（Bohmann et al 2016 Phys.）。Rev. A 94 010302(R))用于提高相干态隐形传态的保真度。首先，我们证明了增加表征纠缠态的压缩参数受到其最优值的限制，并通过实际的实验验证了该值。此外，我们考虑了损耗的自适应相关技术，并展示了其在具有大压缩参数的信道中的性能。最后，我们研究了后选择策略的效率依赖于信道透过率的随机特性。
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.