cold atoms

Direct control of high magnetic fields for cold atom experiments based on NV centers

In ultracold quantum gases, the interactions between the individual atoms can be controlled by applying magnetic bias fields. As magnetic field fluctuations limit the precision here, typically a feedback loop needs to be employed to regulate the …

Exploring and Benchmarking Quantum-assisted Neural Networks with Qubit Layers

The aim of this work is to explore practical implementations of Quantum and Quantum-assisted Machine Learning algorithms and benchmark potential benefits of utilizing quantum phenomena in Quantum-assisted Neural Networks with qubit layers. Two known …

A NV center based magnetic field stabilization for atomic physics experiments

In atomic physics experiments, setting the magnetic field strength allows one to create spin dynamics between atoms, or to tune the interaction between them. This makes stable magnetic fields desirable, but unfortunately no commercially available …

Building up a modular Na-K quantum gas experiment

This thesis describes the construction of a second generation, ultracold atomic mixture experiment, aiming for modularity, robustness and compactness. The setup is designed to work with Bose-Fermi (23Na, 40K) and Bose-Bose (23Na, 39K) mixtures. The …

Starting a Na-K experiment for simulating quantum many-body phenomena

This thesis describes the construction of a new apparatus to study quantum gas mixtures of sodium and potassium. Our experimental approach entails, using two independent two-dimensional magnetooptical traps (2D MOTs) as sources of cold atoms for a …

Active Magnetic Field Stabilisation for Ultracold Sodium Lithium Mixtures

This thesis discusses technical improvements done at a sodium lithium mixtures experiment, to enable measurements highly sensitive on the magnetic field. An active magnetic field stabilisation for low magnetic fields of less then one gauss was tested …

Quantum transport of ultracold atoms in disordered potentials

In this thesis we study the quantum transport of matter waves with ultracold atoms. Such ultracold atom systems provide a very good control and a high flexibility of the parameters of the systems like the interactions, its dimensionality and the …

Quantum transport of ultracold atoms in disordered potentials

In this thesis we study the quantum transport of matter waves with ultracold atoms. Such ultracold atom systems provide a very good control and a high flexibility of the parameters of the systems like the interactions, its dimensionality and the …