One Photon Can Simultaneously Excite Two or More Atoms.

@article{Garziano2016OnePC,
  title={One Photon Can Simultaneously Excite Two or More Atoms.},
  author={L. Garziano and Vincenzo Macr'i and R. Stassi and Omar Di Stefano and F. Nori and S. Savasta},
  journal={Physical review letters},
  year={2016},
  volume={117 4},
  pages={
          043601
        }
}
We consider two separate atoms interacting with a single-mode optical or microwave resonator. When the frequency of the resonator field is twice the atomic transition frequency, we show that there exists a resonant coupling between one photon and two atoms, via intermediate virtual states connected by counterrotating processes. If the resonator is prepared in its one-photon state, the photon can be jointly absorbed by the two atoms in their ground state which will both reach their excited state… Expand
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