Entangling two separate photonic ququarts using linear optical elements
Osung Kwon, Young-Sik Ra, Hyang‐Tag Lim, Yong‐Su Kim, Yoon-Ho Kim · Physical Review A · 2014
We report an experimental demonstration of entangling two separable photonic ququarts using linear optical elements. Each ququart is implemented by using the dichotomic spatial and polarization modes of a single photon. By interfering two independent ququarts at a polarizing beam splitter, we experimentally generate entangled ququarts.