A scheme for demonstration of four-photon de Broglie wavelength
Xiaoqi Zhou, Yang Tao · Chinese Physics B · 2008
We propose a scheme to effectively generate a four-photon path-entangled number state [the NOON state i.e. for the demonstration of four-photon de Broglie wavelength. Our scheme requires only linear optical elements, photon detectors and post-selections which are all within the reach of current technology.