Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster – Ultracold Matter (joint session Q/A)
Q 42.18: Poster
Wednesday, March 4, 2026, 17:00–19:00, Philo 2. OG
Shielding of ultracold Lithium-6 — •Finn Lubenau, Daniel Dux, Tim Schiffer, Tobias Hammel, Maximilian Kaiser, Matthias Weidemüller, and Selim Jochim — Physikalisches Institut, Heidelberg, Germany
We are presenting the Heidelberg Quantum Architecture [1], a modular quantum gas platform creating a degenerate fermi gas of 6Li, that combines individual modules to implement a large variety of functionalities, that can be quickly updated and exchanged.
Here, we will report on the implementation of an optical dipole trap module at 812 nm near the 2P ←→ 3S resonance. While the imaging transition used in our system is the D2-line of 6Li at 671 nm between the 2S and 2P fine structure levels, the 812 nm trap introduces a large light shift of the 2P level, as this level has a diverging polarisability at this wavelength, effectively detuning the imaging transition from the imaging laser. This allows for site selective shielding of the atoms and thus enables partial probing of the system.
Additionally, we present a spatial light modulator (SLM) module to create precise and reproducible tuneable light fields, including the ability to correct for optical aberrations and in-shot dynamic repositioning of the atoms.
[1]: T. Hammel, M. Kaiser et al., Modular quantum gas platform, Phys. Rev. A 111, 033314
Keywords: Shielding; Cold Atoms; Degenerate Fermi Gas; Lithium; Spatial Light Modulator