Quantum Control Group
(Team leader: Dr. Kai Müller)

Our group investigates how one might be able to control and use quantum states in semiconductor nanostructures to realise new technologies. Using optical techniques, we explore spin dynamics and quantum photonic properties of a variety of quantum systems. Whilst being very fundamental and seemingly ethereal, obtaining an understanding of how one can harness such quantum properties is likely to have a major impact on future technologies.


Current research topics:

Quantum optics and spin dynamics of self-assembled quantum dots

We investigate quantum optical methods to prepare, manipulate and readout quantum superposition states in self-assembled quantum dots. Due to their strong optical transitions with almost transform-limited linewidth quantum dots are ideal prototypes for solid-state quantum emitters. Among our current experiments are resonance fluorescence investigations of quantum optical properties of quantum dots as well as investigations of the complex dynamics of single spins confined to quantum dots resulting from interaction with the surrounding nuclear spin bath. (Click for more details)


Spin-Valley physics based on two-dimensional crystals

We investigate Spin-Valley physics with atomically thin two-dimensional crystals such as transition metal dichalcogenides. While structurally being similar to graphene, these crystals exhibit a direct bandgap in the monolayer limit allowing for optical access to spin-valley polarization. Currently, we investigate the possibility to tune quantum properties of two dimensional crystals and heterostructures using field effective devices. (Click for more details)


Subgroup members

Tobias Simmet, Lukas Hanschke, Jakob Wierzbowski, Malte Kremser, Anna Nolinder, William Rauhaus, Theresa Grünleitner, Janine Gückelhorn, Friedrich Sbresny, Kai Müller, Jonathan Finley



A list of our subgroup’s recent publications can be found here.
A complete list of the team leader’s publications can be found here


Open positions:

We are always looking for highly motivated students. Interested applicants should contact Dr. Kai Müller for an informal discussion on the opportunities available in the Applied Quantum Science Group.



We gratefully acknowledge funding from the Nanosystems Initiative Munich (NIM) and the PhD program ExQM of the Elite Network of Bavaria.

TUM Technische Universität München TUM Technische Universität München Physik Department Elektrotechnik und Informationstechnik TUM Technische Universität München


Dr. Kai Müller
Office: S213
Email: Kai.Mueller(at)wsi.tum.de