Designing frequency-dependent relaxation rates and Lamb shifts for a giant artificial atom

@article{Kockum2014DesigningFR,
  title={Designing frequency-dependent relaxation rates and Lamb shifts for a giant artificial atom},
  author={Anton Frisk Kockum and Per Delsing and G{\"o}ran Johansson},
  journal={Physical Review A},
  year={2014},
  volume={90},
  pages={013837}
}
In traditional quantum optics, where the interaction between atoms and light at optical frequencies is studied, the atoms can be approximated as pointlike when compared to the wavelength of light. So far, this relation has also been true for artificial atoms made out of superconducting circuits or quantum dots, interacting with microwave radiation. However, recent and ongoing experiments using surface acoustic waves show that a single artificial atom can be coupled to a bosonic field at several… 

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