Cavity-mediated light–matter coupling can dramatically alter opto-electronic and physico-
chemical properties of a molecule. Ab initio theoretical predictions of these systems need to …

Inverse design represents a paradigm shift in the development of nanophotonic devices,
where optimal geometries and materials are discovered by an algorithm rather than …

We study cooperative phenomena in the fluctuation-induced forces between a surface and a
system of neutral two-level quantum emitters prepared in a coherent collective state …

Few-mode models are a cornerstone of the theoretical work in quantum optics, with the
famous single-mode Jaynes-Cummings model being only the most prominent example. In …

We demonstrate under which conditions a violation of the charge-parity (CP) symmetry in
molecules will manifest itself in the Casimir-Polder interaction of these with a …

We develop two ab initio quantum approaches to thin-film x-ray cavity quantum
electrodynamics with spectrally narrow x-ray resonances, such as those provided by …

We show that a single photon pulse incident on two interacting two-level atoms induces a
transient entanglement force between them. After absorption of a multi-mode Fock state …

Controlling the optical properties of light-responsive organic molecules is essential for their
application in photonics. We demonstrate how light-responsive organic polaritons formed …

The photonic Bose-Einstein condensate is a recently observed collective ground state of a
coupled light-matter system. We describe this quantum state based on macroscopic …

Ab initio approaches to x-ray cavity QED Page 1 Dissertation Combined Faculty of Natural
Sciences and Mathematics of Heidelberg University, Germany Doctor of Natural Sciences Put …