Coherent matter waves on atom chips

Dr. Peter Krüger, University of Heidelberg


Miniaturizing and integrating atom optical components allows to manipulate matter waves in complex custom designed potentials. Atom chips feature microstructures obtained by standard chip fabrication techniques. They provide an environment in which cold atoms can be controlled on a micron scale using magnetic, electric, and optical fields. Such techniques allow to form tightly confining potentials in complex geometries that cannot be implemented with conventional macroscopic traps. Applications range from quantum control of matter waves to high precision measurements based on atom interferometry. In this talk, the focus will be on recent studies of ultracold atoms and Bose-Einstein condensates (BEC's) that are confined in essentially one-dimensional trapping potentials. We show how microtraps can be used to realize this situation and how additional potential roughness (disorder) can be measured and controlled. We have also demonstrated coherent splitting of one dimensional BEC's in microscopic interferometry experiments based on adiabatic radio frequency induced potentials.