Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 22: Posters: Quantum Optics and Photonics II

Q 22.47: Poster

Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof

Correlations in 2D strongly interacting fermionic systems — •Carl Heintze, Luca Bayha, Marvin Holten, Keerthan Subramanian, Philipp Preiß, and Selim Jochim — Im Neuenheimer Feld 226, 69120 Heidelberg, Germany

Many body quantum effects like superconductivity rely on the microscopic interactions of fermions. We prepare samples of ultra cold Li6-atoms confined to two dimensions to investigate the many body behavior in those systems by tuning the fermionic inter-particle interactions. In the non-interacting system, the spatial distribution of fermions is determined by the Pauli-exclusion principle and the fermions arrange themselves in a so called Pauli-crystal. Starting from non-interacting systems, we plan to observe the N-body correlations in a strongly interacting superfluid.

Even though the Pauli-crystal itself is theoretically well understood, the experimental control poses several difficulties concerning both detection and preparation. We plan to observe the spatial distribution of a six particle Pauli-Crystal using spin-sensitive and single particle resolved fluorescence imaging. By finding the correlations predicted for the non-interacting gas, we want to benchmark our setup to be able to proceed to correlations in strongly interacting systems. On this poster I want to present the experimental procedure and first results of our experiment.

In the future we want to address systems with higher particle numbers and investigate higher order correlations and pairing effects for increasing interactions.