Entangled-state generation with an intrinsically pure single-photon source and a weak coherent source

摘要

We report on the experimental generation of an entangled state with a spectrally pure heralded single-photonnstate and a weak coherent state. Our source, which was as efficient as that reported in our previous reportn[Phys. Rev. A 83, 031805 (2011)], was much brighter than those reported in earlier experiments usingnsimilar configurations. This entanglement system is useful for quantum information protocols that requirenindistinguishable photons from independent sources.