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.
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.
(Anti-)proton quantum logic manipulation trap array