Four-dimensional Quantum Key Distribution using Position-Momentum and Polarization Correlations
Marcelo Pereira de Almeida, Stephen Patrick Walborn, P. H. Souto Ribeiro · arXiv (Cornell University) · 2005
We demonstrate experimentally that it is possible to prepare and detect photon pairs created by spontaneous parametric down-conversion which exhibit simultaneous position-momentum and polarization correlations that are adequate to implement a four-dimensional key distribution protocol.