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Michael Ruggenthaler, ∗ Johannes Flick, Camilla Pellegrini, Heiko Appel, Ilya V. Tokatly, 4 and Angel Rubio 2, † Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 25, A-6020… (More)

- Johannes Flick, M Ruggenthaler, Heiko Appel, Angel Rubio
- Proceedings of the National Academy of Sciences…
- 2017

In this work, we provide an overview of how well-established concepts in the fields of quantum chemistry and material sciences have to be adapted when the quantum nature of light becomes important in… (More)

- Johannes Flick, Christian Dr. Schäfer, M Ruggenthaler, Heiko Appel, Angel Rubio
- ACS photonics
- 2018

We introduce a simple scheme to efficiently compute photon exchange-correlation contributions due to the coupling to transversal photons as formulated in the newly developed quantum-electrodynamical… (More)

- Johannes Flick, M Ruggenthaler, Heiko Appel, Angel Rubio
- Proceedings of the National Academy of Sciences…
- 2015

The density-functional approach to quantum electrodynamics extends traditional density-functional theory and opens the possibility to describe electron-photon interactions in terms of effective… (More)

We reformulate and generalize the uniqueness and existence proofs of time-dependent density-functional theory. The central idea is to restate the fundamental one-to-one correspondence between… (More)

- M Ruggenthaler, Markus Penz, Robert van Leeuwen
- Journal of physics. Condensed matter : an…
- 2015

In this work we review the mapping from densities to potentials in quantum mechanics, which is the basic building block of time-dependent density-functional theory and the Kohn-Sham construction. We… (More)

- Johannes Flick, Heiko Appel, M Ruggenthaler, Angel Rubio
- Journal of chemical theory and computation
- 2017

In this work, we illustrate the recently introduced concept of the cavity Born-Oppenheimer approximation [ Flick et al. PNAS 2017 , 10.1073/pnas.1615509114 ] for correlated electron-nuclear-photon… (More)

Johannes Flick, 2, ∗ Davis M. Welakuh, † Michael Ruggenthaler, ‡ Heiko Appel, § and Angel Rubio 3, ¶ Max Planck Institute for the Structure and Dynamics of Matter and Center for Free-Electron Laser… (More)

- M Ruggenthaler, D. Hans-Jörg Bauer
- Physical review letters
- 2009

The resonant interaction of laser light with atoms is analyzed from the time-dependent density functional theory perspective using a model helium atom which can be solved exactly. It is found that in… (More)

For certain correlated electron-photon systems we construct the exact density-to-potential maps, which are the basic ingredients of a density-functional reformulation of coupled matter-photon… (More)