Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 64: Poster – Ultra-cold atoms, ions and BEC (joint session A/Q)

Q 64.32: Poster

Thursday, March 5, 2026, 17:00–19:00, Philo 1. OG

Towards Lithium Bose-Fermi-mixtures in a compact experimental apparatus — •Jonathan Bracker, Martin Guillot, and Christof Weitenberg — Technische Universität Dortmund

We present the design of a versatile lithium quantum gas machine with a 2D/3D MOT setup and high-resolution access with an NA of 0.5. A matter-wave microscope using optical traps allows magnifying the density by a factor of 35. It also enables the realisation of a phase microscope, mapping phase fluctuations to density fluctuations for a BEC in a triangular optical lattice. Upon the reassembly of the machine after relocation, we are currently implementing an upgrade to allow for the preparation of Bose-Fermi mixtures of Li7 and Li6. We present the laser system that provides all the necessary frequencies for simultaneous sub-Doppler laser cooling as well as future plans to use the mixture for studying various scenarios of driven-dissipative systems. In particular, we will use the Li6 cloud as a bath to absorb heating of a Li7 system upon manipulation with moderately near-resonant light.

Keywords: Lithium; Laser cooling; MOT; Bose-Fermi-mixtures; Dissipation