Open positions

Are you
  • motivated to tackle challenging projects at the forefront of fundamental science?
  • interested in ultracold atoms and atomic physics, quantum optics, or laser physics?
  • enjoying hands on experimental research?
  • passionate about the exploration of novel physics ideas?
We are constantly working on exciting experiments and cutting-edge research at the interface between cold and ultracold quantum gases, condensed matter physics, and ultracold chemistry. Independent of your career stage, we are regularly offering possibilities to learn about and join in with our interdisciplinary research. As a part of our team you will have the opportunity to develop your own individual ideas, skills and knowledge in an internationally competitive experimental group that is embedded in the outstanding research environment of Heidelberg University.

Bachelor and master projects

Are you eager to learn about cutting-edge quantum research and technology hands on? In our group you will be supervised and trained to obtain scientific skills by working on atom and quantum optics, laser spectroscopy and advanced laser technology. By joining us you will have the opportunity to acquire skills with basic electronics, high-frequency technology, and feedback control systems, imaging design and fundamental optics, as well as, programming, process control, and data analysis. You will have the opportunity to pursue your own research project and contribute to state-of-the-art research on ultracold quantum gases. Please contact us to discuss available projects or check out these options.

Currently open projects

Rydberg team: Master project on relaxation on spin systems

How do isolated systems relax to equilibrium? How does this depend on disorder, symmetries of the Hamiltonian and range of the interactions? These questions have sparked the interest of researchers from both quantum and statistical physics, and due to recent progress in quantum simulations they lie in the heart of current research. Looking towards the relaxation properties in many-body spin systems, we are investigating various spin models (called Heisenberg spins model) both numerically and experimentally. In order to give support to our Rydberg experiment which realizes an analog quantum simulator based on highly excited Rydberg atoms, we have developed numerical tools based on semi-classical methods to access the dynamics of such spin models.
We propose a Master project based on numerical simulation of spin systems using a well-established technic (discrete Truncated Wigner Approximation dTWA) to explore, validate and understand recent experiments where we have realized Hamiltonian engineering of arbitrary Heisenberg spin Hamiltonians and observed a many-body phase characterized by abnormally slow relaxation dynamics.

The aim is twofold:
  1. We want to use the numerical tools to obtain knowledge about relaxation dynamic of various spin systems.
  2. We would like to use the numeric to guide the experiment towards the regime of interest to uncover interesting spin dynamics. The experiment being ready to use, measures can be taken during the course of the Master thesis after proper numerical investigations.
No numerical skills are required for this master thesis, just curiosity about many-body dynamic in spins systems.
If you are interested about this project, please contact Clément Hainaut (

HAI-Trap team: Master project on atom-ion interaction dynamics

We are offering Master thesis project in the HAI-Trap experiment. During your thesis, you will learn about production and trapping of ions, and exploring their interaction dynamics with the co-trapped atoms. Furthermore, you will work in a small team in order to contribute to state-of-the-art research on hybrid atom-ion traps. For more information, please contact Prof. Matthias Weidemueller ( and/or Saba Hassan (

Doctoral positions

Are you ready to push forward the fundamental understanding of modern quantum physics by experimentally tackling a challenging and pressing project in the field of ultracold quantum gases? During your doctorate you will be able to polish your experimental skills and knowledge in laser, atom, and molecular physics and quantum optics. You will have the opportunity to develop your soft skills such as presentation techniques (writing publications or giving talks at conferences) and basic teaching skills. Being part of the Heidelberg Graduate School of Fundamental Physics (HGSFP) and/or International Max Planck Research School for Quantum Dynamics in Physics, Chemistry and Biology (IMPRS-QD) you will have many opportunities for scientific exchange with students and researchers from other groups, often abroad, and access to initiatives such as the graduate days, winter schools, and others.

Postdoctoral researchers

You have finished (are soon finishing) your PhD thesis and are interested in atom, ion, and molecular physics in ultracold quantum gases at different levels of complexity? Our group’s philosophy is built around a lot of freedom for new and inspiring ideas. You will be able to develop your own concepts, take over responsibility early on, and build on the excellent infrastructure. You will be immersed in our large collaborative network enabling you to work on major scientific questions and hot-topics with world leading experts in this field.

Please contact Prof. Matthias Weidemüller to find out more about currently available projects and positions.