Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 68: Quantum Gases: Fermions III
Q 68.5: Vortrag
Freitag, 4. März 2016, 15:30–15:45, e001
Microscopic Observation of Pauli Blocking in Degenerate Fermionic Lattice Gases — •Timon Hilker, Ahmed Omran, Martin Boll, Katharina Kleinlein, Guillaume Salomon, Immanuel Bloch, and Christian Gross — Max-Planck-Institute für Quantenoptik
Ultracold atoms in optical lattices provide a powerful platform for the controlled study of quantum many-body physics. We present here the first studies of a Fermi gas with a new generation quantum gas microscope, which allows to observe the full atom number statistics on every site. The common problem of light induced losses is avoided by an additional small scale ”pinning lattice” for Raman sideband cooling during the imaging.
We report the local observation of Pauli’s exclusion principle in a spin-polarized degenerate gas of 6Li fermions in an optical lattice. In the band insulating regime, we measure a strong local suppression of particle number fluctuations and we extract a local entropy as low as 0.3 kB per atom. Our work opens an avenue for studying local density and even magnetic correlations in fermionic quantum matter both in and out of equilibrium.