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Department of Physics

Experimental physics with ultracold quantum gases

Welcome to the ultracold quantum gas group at TU Dortmund. We work with ultracold atoms and utilize them to explore the fascinating world of quantum many-body physics. 

We are always looking for motivated team members from Bachelor and Master students to PhD students and Postdoc. Please contact Christof Weitenberg if you are interested in joining our quest for quantum science.

06/23/2026

Christof Weitenberg awarded ERC Advanced Grant

Prof. Christof Weitenberg has been awarded an ERC Advanced Grant by the European Research Council for his project "InToCold" amounting to 3.5 million…
Group Leader Prof. Christof Weitenberg
06/15/2026

Adiabatic realization of anomalous Floquet topological systems

In a new article, we introduce an new way to realize anomalous Floquet topological systems via adiabatic sweeps.
Parameter space of the tunable hexagonal lattices with the differences in tunneling elements J1, J2, J3 along the three bond directions and the offset Delta between the two sublattices
03/31/2026

Proposal for a phase-space microscope for quantum gases

In a new article, we studied the possiblity of measuring phase-space observables in synthetic quantum systems of ultracold atoms.
Part of a sketch of the protocol for mapping momentum to an auxiliary dimension to realize a 1D Husimi-Q phase-space microscope.
03/26/2026

A new and experimentally feasible observable for anomalous Floquet topology

In a new article, we introduce a new and experimentally feasible observable for anomalous Floquet topology.
Spectrum of the periodically driven system showing the quasi-energy as a function of quasi-momentum with the bulk bands in grey and the chiral edge states in blue. The spectrum is periodic in energy and allows for edge states in the additional band gap.
02/12/2026

Proposal for a many-body phase microscope

In a new article, we propose a many-body phase microscope for accessing the phase coherence in quantum many-body systems in relevant physical…
01/29/2026

International Summer School on Driven-Dissipative Many-Body Systems

The International Summer School on Driven-Dissipative Many-Body Systems will be held from 22–26 June 2026.
Visualisation of an open quantum system
07/28/2025

Anomalous condensate fluctuations

In a new study, we explored anomalous fluctuations of atomic Bose-Einstein condensates.
Sketch of a Bose-Einstein condensate in a triangular lattice.
03/25/2025

Review on nonstandard geometries

We have written a review on the status of quantum simulation of exotic geometries, impossible to find in the real world.
Artist's impression of a fractal geometry known as Sierpiński gasket.
10/14/2024

A phase microscope for quantum gases

We have realized a microscope that measures phase profiles of a Bose-Einstein condensate in an optical lattice with single-site resolution.
Scheme of the phase microscope.