We describe an easily implementable method for non-destructive measurements of ultracold
atomic clouds based on dark field imaging of spatially resolved Faraday rotation. The signal …

The fluctuations in thermodynamic and transport properties in many-body systems gain
importance as the number of constituent particles is reduced. Ultracold atomic gases provide …

We prepare number stabilized ultracold atom clouds through the real-time analysis of
nondestructive images and the application of feedback. In our experiments, the atom …

We report on the implementation of an optical tweezer system for controlled transport of
ultracold atoms along a narrow, static confinement channel. The tweezer system is based on …

We have studied the coherent evolution of ultracold atomic rubidium clouds subjected to a
microwave field driving Rabi oscillations between the stretched states of the F= 1 and F= 2 …

We demonstrate how dispersive atom number measurements during evaporative cooling
can be used for enhanced determination of the parameter dependence of the transition to a …

We experimentally and theoretically investigate in-medium propagation effects of off-
resonant light in dense, spatially inhomogeneous ultracold atomic gases. Focussing on …

We demonstrate a method to reduce number fluctuations in an ultracold atomic sample
using real-time feedback. By measuring the Faraday rotation of an off-resonant probe laser …

Magnetically tunable Feshbach resonances in ultracold atomic systems are chiefly identified
and characterized through time-consuming atom loss spectroscopy. We describe an off …

This thesis describes experiments investigating the collisions of alkali metal atoms at
energies between 10− 2000 µK, measured in units of the Boltzmann constant. The atoms …