Fourier relationship between the angle and angular momentum of entangled photons

@article{Jha2008FourierRB,
  title={Fourier relationship between the angle and angular momentum of entangled photons},
  author={Anand K Jha and Barry Jack and Eric Yao and Jonathan Leach and Robert W. Boyd and Gerald S. Buller and Stephen M. Barnett and Sonja Franke-Arnold and Miles J. Padgett},
  journal={Physical Review A},
  year={2008},
  volume={78},
  pages={043810-043810}
}
We study the Fourier relationship between angle and orbital angular momentum of entangled photons. Spatial light modulators allow us to define and control the spatial mode measurement state. We observe strong quantum correlations, establishing that angular position and momentum distributions between the photons are related as conjugate Fourier pairs. 

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