A simple optical demonstration of quantum cryptography using transverse position and momentum variables
D. S. Lemelle, Marcelo Pereira de Almeida, P. H. Souto Ribeiro, Stephen Patrick Walborn · American Journal of Physics · 2006
We discuss a simple experiment illustrating the fundamentals of quantum cryptography. Our experiment is performed using novel complementary observables: the transverse position and momentum of photons. In the classical optics regime the experiment serves as an interesting and simple classroom demonstration of the principles of quantum key distribution.