Few-Mode Field Quantization of Arbitrary Electromagnetic Spectral Densities.

@article{Medina2021FewModeFQ,
  title={Few-Mode Field Quantization of Arbitrary Electromagnetic Spectral Densities.},
  author={I. Medina and Francisco J. Garc{\'i}a-Vidal and Antonio I. Fern{\'a}ndez-Dom{\'i}nguez and Johannes Feist},
  journal={Physical review letters},
  year={2021},
  volume={126 9},
  pages={
          093601
        }
}
We develop a framework that provides a few-mode master equation description of the interaction between a single quantum emitter and an arbitrary electromagnetic environment. The field quantization requires only the fitting of the spectral density, obtained through classical electromagnetic simulations, to a model system involving a small number of lossy and interacting modes. We illustrate the power and validity of our approach by describing the population and electric field spatial dynamics in… 
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