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Logo: Institut für Quantenoptik/Leibniz Universität Hannover
Logo Leibniz Universität Hannover
Logo: Institut für Quantenoptik/Leibniz Universität Hannover
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Jobs

Join the Trapped-Ion Quantum Engineering Group

We are constantly looking for motivated (to-be) ion trappers to join our team! If you are interested in a Bacherlor's thesis, undergraduate work, Master's thesis, PhD thesis or postdoctoral researcher position, please contact Christian Ospelkaus! 

Right now, we have three open positions:

PhD position on advanced surface-electrode ion traps with integrated microwave manipulation 

We are seeking a PhD student for a project on microwave quantum logic in surface-electrode ion traps. The thesis project can focus on the design and / or fabrication and operation of surface-electrode ion traps. The design of our traps is based on highly accurate microwave near-field finite element simulations. We  produce  microfabricated  ion  traps  at  the  PTB  clean  room  center  and  at  LNQE,  Leibniz  University Hannover, both state of the art research clean room facilities. We operate these traps with  9Be+  ions at an intermediate  bias  field  which  is  known  to  create  qubit  states  with  long  coherence  times.  Our  group operates a room temperature ion trap setup and a cryogenic apparatus which is currently being finalized.

The  ideal  candidate  is  highly  motivated  for  an  interdisciplinary  project  between  high  frequency technology,  quantum  optics,  quantum  information  science  and  microfabrication  and  will  have  some background in laser spectroscopy, laser cooling, atom trapping or numerical simulations. 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. A PDF version of this announcement is available here.

Postdoctoral research associate 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. A PDF version of this announcement is available here.

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. A PDF version of this announcement is available here.

(Anti-)proton quantum logic manipulation trap array