master projects & teaching

Master projects

Please contact the PI if you are interested in any of the following projects.

Incorporating Photonic Nonlinearity into QEDFT

Photon blockade uses the fundamental quantum-ness of light in order to convert a coherent drive, e.g. a laser, into single-photon sources. The latter are highly sought-after as they serve as important ingredients in modern quantum communication and technology. Unfortunately, the theoretical description of this effect is often strongly oversimplified and, especially on the material-side, it is little known about the dynamics of the atom or molecule. You will change this by dressing the photonic Feynmann diagrams of an existing functional to investigate the consequences for simple systems. This is an important development-step of QEDFT and will place you in an ideal situation to continue in the exciting field of ab initio QED.

Promoting Few-Emitter Lasing using Open-System Many-Body Methods

Lasers are widely used, from fundamental science, accurate sensors, to autonomous driving. A less explored yet exciting domain are molecular few-emitter lasers. Such systems sit somewhere in between a classical laser and a typical quantum system. We have developed a new approach to describe such systems, allowing us to go beyond the established approximations. What remains now is to leverage this approach to better understand few-emitter lasers, ideally boosting their performance in unexplored parameter domains. A widely applied approximation is that of incoherent pumping, but this limits theoretical descriptions to only a subset of emitters and driving characteristics. Your contribution will provide an important step in developing new lasers that can be designed on nanometer scales and that will host physics that remains largely unexplored.

Promoting User-friendliness for Open-System Many-Body Methods

We recently developed a powerful framework that paves the way in which material design and quantum optics will meet. Naturally, we are convinced that this is a major development step that should be widely used with a low entrance barrier. You will dive into our framework and refine its user-friendliness. This project is focused on coding and is ideal for students interesd in coding and computational sciences.

Unscrambling Information-flow on Quantum Chips with Long-Range Interaction

In this project, you will dive into a concept referred to as ’information scrambling’. Scrambling can be used to quantify how quick quantum information is transferred between two points. Imagine a chain of Qubits: exciting one will generate a perturbation that is traveling through the network of interacting Qubits on the quantum chip. Clearly, any realistic chip will be stuffed with flaws that will affect how efficiently information can spread. This project will be focused on investigating the impact of long-range interaction, visualizing, and improving the flow of information.

Teaching

Ab initio QED

venue: RTG DynCAM – summer school 2023

format: 5 x 90 minutes

material: lecture notes and slides (please contact me if you are interested)