All-optical quantum random bit generation from intrinsically binary phase of parametric oscillators.

@article{Marandi2012AllopticalQR,
  title={All-optical quantum random bit generation from intrinsically binary phase of parametric oscillators.},
  author={Alireza Marandi and Nick C. Leindecker and Konstantin L. Vodopyanov and Robert L. Byer},
  journal={Optics express},
  year={2012},
  volume={20 17},
  pages={
          19322-30
        }
}
We demonstrate a novel all-optical quantum random number generator (RNG) based on above-threshold binary phase state selection in a degenerate optical parametric oscillator (OPO). Photodetection is not a part of the random process, and no post processing is required for the generated bit sequence. We show that the outcome is statistically random with 99% confidence, and verify that the randomness is due to the phase of initiating photons generated through spontaneous parametric down conversion… 

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