K hexagonal lattice

Our experimental setup consists of a 39K BEC in an optical honeycomb lattice. The lattice is formed by three propagating, s-polarized, blue-detuned laser beams at a wavelength of  745nm, which interfere in the xy-plane at relative angles of 120°.

Realization of Floquet topological phases

Periodic modulation is a powerful tool for the realization of topological phases in synthetic quantum systems. In our experiment we realize a periodically driven honeycomb lattice via periodic modulation of the intensities of the individual lattice laser beams. This breaks time-reversal symmetry and leads to a rich variety of Floquet topological phases.
Real-space detection and manipulation of topological edge modes

Numerical & theoretical work

Here we collect research from our group that we performed together with our theory colleagues in order to develop a better understanding of the quantum many-body systems we are planning to study. more

The team

• Christoph Braun, Senior Scientist
• Alexander Hesse, PhD
• Johannes Arceri, PhD
• Moritz Hornung, PhD
• Carlo Daniel, Master student

Former members:

• Dr. Raphaël Saint-Jalm, PostDoc
• Dr. Karen Wintersperger, PhD
• Dr. Jakob Näger, PhD
• Dr. Martin Reitter, PhD
• Valentin Weyerer, Master student
• Simon Karch, Internship student