Subradiance in a Large Cloud of Cold Atoms.

  title={Subradiance in a Large Cloud of Cold Atoms.},
  author={William Guerin and Michelle Oliveira de Araujo and Robin Kaiser},
  journal={Physical review letters},
  volume={116 8},
Since Dicke's seminal paper on coherence in spontaneous radiation by atomic ensembles, superradiance has been extensively studied. Subradiance, on the contrary, has remained elusive, mainly because subradiant states are weakly coupled to the environment and are very sensitive to nonradiative decoherence processes. Here, we report the experimental observation of subradiance in an extended and dilute cold-atom sample containing a large number of particles. We use a far detuned laser to avoid… 

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