Three-photon N00N states generated by photon subtraction from double photon pairs.
We describe an experimental demonstration of a novel three-photon N00N state generation scheme using a single source of photons based on spontaneous parametric down-conversion (SPDC). The three-photon entangled state is generated when a photon is subtracted from a double pair of photons and detected by a heralding counter. Interference fringes measured with an emulated three-photon detector reveal the three-photon de Broglie wavelength and exhibit visibility > 70% without background subtraction.
Kim
Heonoh
H
Division of Convergence Technology, Korea Research Institute of Standards and Science 1 Doryong-dong, Yuseong-gu, Daejeon 305-340, Republic of Korea.
Park
Hee Su
HS
Choi
Sang-Kyung
SK
D003198:Computer Simulation; D008027:Light; D008962:Models, Theoretical; D017785:Photons; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation