Heralded multiphoton GHZ-type polarization entanglement generation from parametric down-conversion sources
Xiao-Ling Niu, Yan-Xiao Gong, Xu‐Bo Zou, Yun‐Feng Huang, Guang‐Can Guo · Journal of Modern Optics · 2009
We propose a scheme to generate an N-photon GHZ-type polarization-entangled state from 2N − 1 parametric down-conversion sources, by using only linear optical elements and projective measurements. Successful preparation is heralded by detecting 3N − 2 photons with ideal number-resolving photon detectors.