Influence of Atmospheric Turbulence on a High-Dimensional Quantum Key Distribution System using Orbital Angular Momentum for Encoding

Details Influence of Atmospheric Turbulence on a High-Dimensional Quantum Key Distribution System using Orbital Angular Momentum for Encoding Influence of Atmospheric Turbulence on a High-Dimensional Quantum Key Distribution System using Orbital Angular Momentum for Encoding

2012-04-25

arxiv.org/abs/1204.5781v1

Physics

Quantum Physics

6 pages, 5 figures

Scientific paper

We describe an experimental implementation of a free-space 11-dimensional quantum key distribution (QKD) system using orbital angular momentum (OAM) modes. This QKD system has a maximum theoretical channel capacity of log2(11) = 3.46 bits/photon. The effects of Kolmogorov thin-phase turbulence on the OAM channel capacity of this QKD system are quantified. We find that increasing the turbulence leads to a degradation of the channel capacity of the OAM channel. We are able to mitigate the effects of turbulence by increasing the spacing between detected modes.

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