Quantum dynamics of atomic and molecular systems
Our group studies atomic and molecular quantum systems with respect to their interactions on different levels of complexity. Of special importance is the application and extension of modern methods for the manipulation and quantum control to many-body quantum systems, in particular using coherent light. The systems under investigation range from highly excited Rydberg atoms over atomic and molecular quantum gases to molecular aggregates. The group develops technologies for trapping and cooling of neutral atoms as well as quantum-state sensitive diagnostics.
Latest news from the lab
|Dr. Clément Hainaut is now an Alexander von Humboldt Fellow ||28.02.2019|
Congratulations to Clément Hainaut who was awarded an Alexander von Humboldt Fellowship! Clément joined the Rydberg team as a postdoc for investigating relaxation dynamics of Rydberg spin systems as well as nonlinear photon interactions in a Rydberg EIT medium!
|Annika Tebben receives Otto-Haxel-Prize for her Master thesis ||27.10.2018|
During her Master thesis Annika Tebben investigated the nonlinear optical response of an interacting Rydberg gas under conditions of electromagnetically induced transparency. In collaboration with the group of Thomas Pohl (Aarhus) she found a method to resonantly enhance the associated nonlinear susceptibility. For her outstanding work Annika was awarded the Otto-Haxel-Prize of the department of physics and astronomy of Heidelberg University. Congratulations!
For more highlights see our news page
|PhD-Meeting "FOR2247: From few to many body physics with dipolar quantum gases", 22-24.10 Heidelberg||16.10.2018|
From 22nd to 24th of October 2018 the PhD-Meeting of the Forschergruppe "FOR2247: From few to many-body physics with dipolar quantum gases" will take place at the Internationales Wissenschaftsforum Heidelberg (IWH) in Heidelberg. During the meeting, we are honoured to have lectures given by Prof. Dr. Tilman Esslinger and Prof. Dr. Olivier Dulieu concerning long-range interactions in systems of cavity-confined ultracold atoms and ultracold polar molecules.
For more information:
Mixtures of ultracold atoms and molecules
In this experiment we use a mixture of two different alkali metals: cesium and lithium. This gives us the possbility to form ultracold LiCs dimers. These molecules have an extremely large electric dipole moment which promises many new experiments. For example, the molecules can be orientated in an external electric field.
Strongly-correlated Rydberg quantum gases
Rydberg atoms are atoms in highly excited electronic states. These atoms are very sensitive to external fields and experience extremely strong interactions with other Rydberg atoms. This gives us a model system for studying strongly-correlated quantum systems that is highly controllable and completely governed by interatomic interactions.
Collisions of highly charged ions and cold atoms
We are currently setting up this new experiment. Our goal is to investigate multiple electron capture using the combined techniques of magneto-optically cooling and trapping of the target atoms and using recoil ion momentum spectroscopy.
Hybrid ion atom trap for cold chemistry experiments
Interactions between ions and neutrals play an important role in all kind of chemical reactions. In order to gain a full understanding of these systems we are trying to observe reactions at ultra-low temperatures. In this regime the reaction dynamics are no longer concealed by the thermal movement of the particles.
Rydberg physics with ultracold two-electron systems
We are setting up an experiment to study the physics of two-electron Rydberg atoms using a quantum gas of ultracold strontium. The experiment is located at the University of Science and Technology of China (USTC Shanghai Institute for Advanced Studies). First studies will be aiming to explore many-body effects induced by the long-range interactions between highly excited strontium Rydberg atoms, using the inner electron to control the atom's motion and to detect single Rydberg atoms.