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Updated: Jun 17, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Three-photon N00N states generated by photon subtraction from double photon pairs
Heonoh Kim1, Hee Su Park, Sang-Kyung Choi
1Division of Convergence Technology, Korea Research Institute of Standards and Science 1 Doryong-dong, Yuseong-gu, Daejeon 305-340, Republic of Korea.
Abstract:
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.
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