# 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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