Quantum key distribution in a high-dimensional state space: exploiting the transverse degree of freedom of the photon
Robert W. Boyd, Anand K. Jha, Mehul Malik, Colin O’Sullivan, Brandon Rodenburg, Daniel J. Gauthier · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2011
We describe a procedure to construct a free-space quantum key distribution system that can carry many bits of information per photon. We also describe the current status of our laboratory implementation of these plans.