Quantum teleportation through atmospheric channels
arXiv:1901.07794 · doi:10.1088/1402-4896/ab36e0
Abstract
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., Phys. Rev. A 94, 010302(R) (2016)] 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.
11 pages, 8 figures
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- Fourth-order moment of the light field in atmosphere
- Time correlations in atmospheric quantum channels
- Fourth-order moment of the light field in atmosphere for moderate and strong turbulence
- Circular-beam approximation for quantum channels in a turbulent atmosphere