120 citations · 469 across the 11 of their papers we have counts for
5 papers · 1 filter
Trapping of ultra cold atoms in a 3He/4He dilution refrigerator
F. Jessen, M. Knufinke, S. C. Bell +13
We describe the preparation of ultra cold atomic clouds in a dilution refrigerator. The closed cycle 3He/4He cryostat was custom made to provide optical access for laser cooling, o…
Manipulation and coherence of ultra-cold atoms on a superconducting atom chip
S. Bernon, H. Hattermann, D. Bothner +8
The coherence of quantum systems is crucial to quantum information processing. While it has been demonstrated that superconducting qubits can process quantum information at microel…
Detrimental adsorbate fields in experiments with cold Rydberg gases near surfaces
H. Hattermann, M. Mack, F. Karlewski +3
We observe the shift of Rydberg levels of rubidium close to a copper surface when atomic clouds are repeatedly deposited on it. We measure transition frequencies of rubidium to S a…
Measurement of absolute transition frequencies of 87Rb to nS and nD Rydberg states by means of electromagnetically induced transparency
Markus Mack, Florian Karlewski, Helge Hattermann +4
We report the measurement of absolute excitation frequencies of 87Rb to nS and nD Rydberg states. The Rydberg transition frequencies are obtained by observing electromagnetically i…
Meissner effect in superconducting microtraps
D. Cano, B. Kasch, H. Hattermann +4
We report on the realization and characterization of a magnetic microtrap for ultra cold atoms near a straight superconducting Nb wire with circular cross section. The trapped atom…