Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.2: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
Exploring the doped Fermi-Hubbard model in low dimensions — •Jayadev Vijayan1, Timon Hilker1, Guillaume Salomon1, Joannis Koepsell1, Michael Höse1, Immanuel Bloch1,2, and Christian Gross1 — 1Max-Planck-Institute für Quantenoptik, Garching — 2Fakultät für Physik, Ludwig- Maximilians-Universität, München
We use ultracold fermionic lithium atoms in an optical lattice to realize synthetic one dimensional Fermi-Hubbard chains. Using a quantum gas microscope that can resolve local spin and density, we study emerging antiferromagnetic correlations as a function of doping and magnetization. We see signatures of spin-charge separation in the one dimensional chains by using three point correlation functions, opening the route towards a direct measurement of the complex correlations arising in two dimensions. We further observe the change of the wave vector of the spin correlations as a function of density and magnetization, which can be well described by Luttinger-liquid theory. Finally we report on ongoing studies of the system in the crossover from one to two dimensions.