Coherence in a cold atom photon transistor

@article{Li2015CoherenceIA,
  title={Coherence in a cold atom photon transistor},
  author={Weibin Li and Igor Lesanovsky},
  journal={Physical Review A},
  year={2015},
  volume={92},
  pages={043828}
}
Recent experiments have realized an all-optical photon transistor using a cold atomic gas. This approach relies on electromagnetically induced transparency (EIT) in conjunction with the strong interaction among atoms excited to high-lying Rydberg states. The transistor is gated via a so-called Rydberg spinwave, in which a single Rydberg excitation is coherently shared by the whole ensemble. In its absence the incoming photon passes through the atomic ensemble by virtue of EIT while in its… 

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