Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 22: Posters: Quantum Optics and Photonics II

Q 22.52: Poster

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

Correlation measurements of mesoscopic two-dimensional Fermi systems — Ralf Klemt, •Philipp Lunt, Jan Hendrik Becher, Ram-Janik Petzold, Philipp Preiss, and Selim Jochim — Physics Institute, Heidelberg University, Germany

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 lithium-6 atoms in the BEC-BCS crossover by phase coherence [1] and pairing energy [2] measurements. Furthermore, utilizing local observables on the single atom level, we can characterize microscopic quantum systems by their correlation and entanglement properties [3, 4].

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. We 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.

[1] P. Murthy et al. Science 365, 268-272 (2019) [2] P. Murthy, M. Neidig, R. Klemt et al. Science 359, 452-455 (2018) [3] A. Bergschneider, V. Klinkhamer et al. Phys. Rev. A 79, 063613 (2018) [4] P. Preiss et al. Phys. Rev. Lett. 122, 143602 (2019)