Heralded Generation of a Three-Photon N00N State
Heonoh Kim, Hee Su Park, Sang-Kyung Choi · 2009
A heralded three-photon NOON state is generated from two pairs of photons produced by spontaneous parametric down-conversion (SPDC). The measured four-photon coincidences reveal fringes three times finer than single-photon interference.