Working PaperS. E. B. Nielsen, C. Schäfer, M. Ruggenthaler, and A. Rubio, "Dressed-Orbital Approach to Cavity Quantum Electrodynamics and Beyond", (2018), pp. 13.
Working PaperJ. Flick, D. Welakuh, M. Ruggenthaler, H. Appel, and A. Rubio, "Light-Matter Response Functions in Quantum-Electrodynamical Density-Functional Theory: Modifications of Spectra and of the Maxwell Equations", (2018), pp. 27.
Working PaperM. Ruggenthaler, "Ground-State Quantum-Electrodynamical Density-Functional Theory", (2017), pp. 6.