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Q: Fachverband Quantenoptik und Photonik
Q 37: Poster III
Q 37.36: Poster
Wednesday, March 13, 2024, 17:00–19:00, Tent B
Quantum gas microscopy of strongly correlated states of the Fermi-Hubbard model — •Johannes Obermeyer1, Dominik Bourgund1, Petar Bojovic1, Si Wang1, Titus Franz1, Thomas Chalopin1, Immanuel Bloch1,2, and Timon Hilker1 — 1Max-Planck-Institut für Quantenoptik, Garching, Germany — 2Ludwig-Maximilians-Universität, München, Germany
The Fermi-Hubbard model describes phenomena in condensed matter physics including strange metals, the pseudogap or the formation of stripes. The model possibly even explains the fundamental mechanisms of high-Tc superconductivity. With our quantum gas microscope based on ultracold Li-6 atoms we are able to prepare states of the two-dimensional Fermi-Hubbard model and probe the system with single site spin and density resolution. We use an optical superlattice to engineer the Hamiltonian to a one, two or mixed dimensional system. On top of our optical lattice a potential landscape gets projected by a digital mirror device that facilitates the control of the hole doping in the Fermi-Hubbard system. We present our observations of holes moving in an antiferromagnetic background. These observations mark the onset of exploring antiferromagnetism and the highly anticipated pseudogap phase of the doped Fermi-Hubbard model. In future experiments, we want to explore more fundamental predictions of the Fermi-Hubbard model like Mott excitons and aim to decrease our system temperature exerting bilayer cooling. Additionally, the double well structure of the superlattice is expected to enable the realization of collisional two-qubit gates for digital quantum computing.
Keywords: Fermi-Hubbard model; Antiferromagnetism; Pseudogap; Stripe formation; Two-qubit gates