Generalized time-coarse graining as a systematic perturbation theory beyond RWA

[oameye]

https://github.com/leonbello/QuantumGraining.jl
https://ui.adsabs.harvard.edu/abs/2023APS..MARA75002B/abstract
https://ui.adsabs.harvard.edu/abs/2023APS..MARA75003F/abstract
https://arxiv.org/pdf/0812.1507