A polaritonic two-component Bose–Hubbard model

  title={A polaritonic two-component Bose–Hubbard model},
  author={Michael J. Hartmann and Fernando G. S. L. Brand{\~a}o and Martin Bodo Plenio},
  journal={New Journal of Physics},
We demonstrate that polaritons in an array of interacting micro-cavities with strong atom–photon coupling can form a two-component Bose–Hubbard model in which both polariton species are protected against spontaneous emission as their atomic part is stored in two ground states of the atoms. The parameters of the effective model can be tuned via the driving strength of external lasers and include attractive and repulsive polariton interactions. We also describe a method to measure the number… 

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