60 citations · 557 across the 44 of their papers we have counts for
3 papers · 1 filter
Polaritonic Hofstadter Butterfly and Cavity-Control of the Quantized Hall Conductance
Vasil Rokaj, Markus Penz, Michael A. Sentef +2
In a previous work [Phys. Rev. Lett. 123, 047202 (2019)] a translationally invariant framework called quantum-electrodynamical Bloch (QED-Bloch) theory was introduced for the descr…
Making ab initio QED functional(s): Non-perturbative and photon-free effective frameworks for strong light-matter coupling
Christian Schäfer, Florian Buchholz, Markus Penz +2
Strong light-matter coupling provides a promising path for the control of quantum matter where the latter is routinely described from first-principles. However, combining the quant…
Density-Functional Theory on Graphs
Markus Penz, Robert van Leeuwen
The principles of density-functional theory are studied for finite lattice systems represented by graphs. Surprisingly, the fundamental Hohenberg-Kohn theorem is found void in gene…