High-dimensional Quantum Communication

High-dimensional Quantum Communication: We are currently developing quantum protocols that utilize spatial modes of light and entanglement to increase the channel capacity and the level of security of communication protocols. We are developing communications schemes inspired in the Ekert protocol. Here, the polarization and spatial degree of freedom of entangled photons are used to encode multiple bits of information in a single photon. The robustness of these hybrid states under realistic conditions of atmospheric turbulence is being investigated by our group. Furthermore, we are developing new metrics to characterize entanglement in these complex communication modes.