We will soon be on the move from Garching to the University of Tübingen. New projects will start there and PhD and Postdoc positions are available.

We are continuously looking for motivated PhD, Master and Bachelor students

If you are interested in working in our highly motivated team which aims to push the boundaries of experimental ultracold atom physics contact Christian.

Background

Synthetic quantum many-body systems realized with ultracold atoms offer a wide experimental playground to explore fundamental questions in many-body physics. On this platform, one can cleanly realize certain microscopic Hamiltonians from the bottom-up and quantum features can be maintained over long times given the very good isolation of the atomic system from the environment. Recent developments of quantum gas microscopes enabled the manipulation and observation of individual atoms out of typically hundreds present in the system. The combination of excellent detection and control, large particle numbers and good isolation form the environment make these systems an ideal platform for quantum simulation of solid state systems already today and possibly also for technologically relevant problems in the future.

Our projects

Rydberg arrays

We are working on a new hybrid quantum gas microscope / optical tweezer experiment working with potassium atoms. Distinct to previous approaches, we avoid transporting the ultracold atoms between different spatial regions by an optimized microscope design. This allows us to combine optical tweezers and optical lattices in a single apparatus and we expect to boost experimental repetition times by at least an order of magnitude.

Our physics goals include:

  • Deterministically and quickly load optical tweezer arrays employing optical interaction control via “blue shielding”.

  • Induce interactions among atoms separated by micrometer distances using Rydberg excitation and study quantum dynamics in synthetic magnets.

  • Using very strong off-resonant Rydberg coupling – so called “Rydberg dressing” – to induce tailored long-range interactions on ground state atoms.

  • Pushing the limits of Rydberg dressing towards itinerant physics in an optical lattice and in the continuum by understanding complex decoherence and decay processes.

  • Study quantum many-body problems, which require high statistics. Examples include dynamics of single excitations in two dimensions or the measurement of entanglement properties.

Cryogenic fermi microscope

This is a brand new project that is in its early stage of design. The goal is to combine a cryogenic vacuum chamber with a quantum gas microscope for ultracold Fermions. This approach will eliminate background gas losses, which are an important limitation in the evaporation process. Our goals are to challenge the temperature record for ultracold Fermions and to reach record long evolution times to test quantum dynamics on very long scales.