High-dimensional quantum cryptography with twisted light

@article{Mirhosseini2015HighdimensionalQC,
  title={High-dimensional quantum cryptography with twisted light},
  author={Mohammad Mirhosseini and Omar S. Maga{\~n}a-Loaiza and Malcolm N. O’Sullivan and Brandon Rodenburg and Mehul Malik and Martin P. J. Lavery and Miles J. Padgett and Daniel J. Gauthier and Robert W. Boyd},
  journal={New Journal of Physics},
  year={2015},
  volume={17}
}
Quantum key distribution (QKD) systems often rely on polarization of light for encoding, thus limiting the amount of information that can be sent per photon and placing tight bounds on the error rates that such a system can tolerate. Here we describe a proof-of-principle experiment that indicates the feasibility of high-dimensional QKD based on the transverse structure of the light field allowing for the transfer of more than 1 bit per photon. Our implementation uses the orbital angular… 

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