Direct detection of a single photon by humans

  title={Direct detection of a single photon by humans},
  author={Jonathan N. Tinsley and Maxim I. Molodtsov and Robert Prevedel and David Wartmann and Jofre Espigul{\'e}-Pons and Mattias Lauwers and Alipasha Vaziri},
  booktitle={Nature communications},
Despite investigations for over 70 years, the absolute limits of human vision have remained unclear. Rod cells respond to individual photons, yet whether a single-photon incident on the eye can be perceived by a human subject has remained a fundamental open question. Here we report that humans can detect a single-photon incident on the cornea with a probability significantly above chance. This was achieved by implementing a combination of a psychophysics procedure with a quantum light source… CONTINUE READING
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