330 citations · 1.1k across the 14 of their papers we have counts for
4 papers · 1 filter
Kinetics of a single trapped ion in an ultracold buffer gas
Christoph Zipkes, Lothar Ratschbacher, Carlo Sias +1
The immersion of a single ion confined by a radiofrequency trap in an ultracold atomic gas extends the concept of buffer gas cooling to a new temperature regime. The steady state e…
Hybrid quantum systems of atoms and ions
Christoph Zipkes, Lothar Ratschbacher, Stefan Palzer +2
In recent years, ultracold atoms have emerged as an exceptionally controllable experimental system to investigate fundamental physics, ranging from quantum information science to s…
Feasibility of 300 km Quantum Key Distribution with Entangled States
Thomas Scheidl, Rupert Ursin, Alessandro Fedrizzi +8
A significant limitation of practical quantum key distribution (QKD) setups is currently their limited operational range. It has recently been emphasized (X. Ma, C.-H. F. Fung, and…
Cold heteronuclear atom-ion collisions
Christoph Zipkes, Stefan Palzer, Lothar Ratschbacher +2
We study cold heteronuclear atom ion collisions by immersing a trapped single ion into an ultracold atomic cloud. Using ultracold atoms as reaction targets, our measurement is sens…