Open positions

Postdoctoral research position on microwave quantum logic in surface-electrode ion traps

We  are  seeking  a  postdoctoral  research  associate  for  an  experiment  on  microwave  quantum  logic  in surface-electrode ion traps. Our group designs, fabricates and operates surface-electrode ion traps. Our work  is  based  on  the  initial  demonstration  of  [Ospelkaus  et  al.,  Nature  476,  181  (2011)].  The  current advanced design [Carsjens et al., Appl. Phys. B 114, 243 (2014)], has trapped ions, and we are preparing to explore field-independent qubit states with long coherence times and spin-motional couplings as a basis
for multi-qubit quantum logic. The new design has been engineered to take the fidelity of multi-qubit operations to a new level, which is a goal shared across all physical implementations in the thriving field of quantum information processing.

The postdoctoral researcher will lead the experimental effort on the characterization and operation of the traps and contribute to the further development of advanced multi-zone and multi-layer traps. The ideal candidate will have a background in the fields of quantum optics, laser cooling and / or ion trapping. The position will be based at the QUEST Institute for Experimental Quantum Metrology at PTB, Braunschweig, in close collaboration with the Institute of Quantum Optics, Leibniz University Hannover, Germany.

Please contact Christian Ospelkaus for details.

Postdoctoral research position on quantum logic manipulation and detection of single (anti-)protons

We are seeking a postdoctoral researcher to demonstrate quantum logic inspired manipulation of single (anti-)protons through single trapped atomic ions for precision measurements. The direct motivation for this research is that a comparison between the (anti-)proton and proton magnetic moments provides a sensitive test of CPT invariance. The manipulation tools we develop follow the proposal of Heinzen and Windeland [PRA, 1990] and Wineland et al. [J. Res. NIST, 1998]. The necessary interaction between the (anti-)proton and the "qubit'' ion will be provided in a microfabricated double-well Penning trap stack. The full set of methods would make single (anti-)protons amenable to quantum logic manipulation in all their  quantized  degrees  of  freedom.  More  generally,  a  lack  of  manipulation  and  cooling  techniques  is currently an important issue in antiproton based precision experiments, which this project aims to help overcome.

The ideal candidate will have a strong background in experimental work with trapped ions and experience in  several  of  the  areas  of  laser  cooling,  trapped-ion  quantum  logic,  trap  design,  Penning  traps  and precision  measurements.  This  project  is  part  of  and  supported  by  the  BASE  collaboration  (Baryon-Antibaryon Symmetry Experiment). The project is funded by the ERC starting grant "QLEDS''. The position will be based at Leibniz University Hannover, Germany, in close collaboration with the QUEST Institute for Experimental Quantum Metrology at PTB, Braunschweig, and the BASE collaboration.

Please contact Christian Ospelkaus for details.