State-controllable heralding of photon-number entangled states
Young-Sik Ra, Hyang‐Tag Lim, Joo-Eon Oh, Yoon-Ho Kim · 2014
We propose and demonstrate a scheme in which ancillary photons for heralding a photon-number entangled state can control the state to be heralded. This scheme can herald photon-number entangled states having arbitrary number of photons.