Pixel entanglement: experimental realization of optically entangled d=3 and d=6 qudits
Malcolm N. O’Sullivan-Hale, Robert W. Boyd, Irfan Ali Khan, John C. Howell · 2005
We demonstrate a method for creating entangled qudits using momentum and position entanglement in spontaneous parametric down-conversion. We image each photon onto an array of pixels, each representing one level of the qudit state.