Repulsive photons in a quantum nonlinear medium

  title={Repulsive photons in a quantum nonlinear medium},
  author={Sergio H. Cantu and Aditya V. Venkatramani and Wenchao Xu and Leo Zhou and Branislav M Jelenkovi'c and Mikhail D. Lukin and Vladan Vuleti'c},
  journal={Nature Physics},
The ability to control strongly interacting light quanta (photons) is of central importance in quantum science and engineering 1 – 5 . Recently it was shown that such strong interactions can be engineered in specially prepared quantum optical systems 6 – 10 . Here, we demonstrate a method for coherent control of strongly interacting photons, extending quantum nonlinear optics into the domain of repulsive photons. This is achieved by coherently coupling photons to several atomic states… 

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