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Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 34: Quantum gases (Fermions) II

Q 34.5: Vortrag

Mittwoch, 11. März 2020, 15:15–15:30, e214

Correlation measurements of mesoscopic two-dimensional Fermi systems — •Ralf Klemt, Philipp Lunt, Jan Hendrik Becher, Ram-Janik Petzold, Philipp M. Preiss, and Selim Jochim — Physikalisches Institut der Universität Heidelberg, Im Neuenheimer Feld 226, 69120 Heidelberg

Understanding strongly correlated quantum matter on a fundamental level requires both access to microscopic correlations of individual constituents and macroscopic observables of the full system.

In recent years, we developed experimental methods to study global observables in macroscopic two-dimensional Fermi systems of ultracold 6Li atoms in the BEC-BCS crossover by phase coherence and pairing energy measurements. Furthermore, utilizing local observables on the single atom level, we can characterize microscopic quantum systems by their correlation and entanglement properties.

Combining these two approaches, we study the crossover regime between microscopic and macroscopic systems which features already rich many-body physics, however with correlations measurements on the single particle level still feasible. In this talk, I will present first results on preparing and probing very dilute, yet strongly correlated, low entropy states of a few 100 atoms characterized by measurements on density and density correlations.

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