Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 25: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)
Q 25.51: Poster
Tuesday, March 11, 2025, 14:00–16:00, Tent
Quantum simulation and computation using fermions in an optical superlattice — •Marnix Barendregt1, Thomas Chalopin1,2, Petar Bojović1, Si Wang1, Johannes Obermeyer1, Dominik Bourgund1, Titus Franz1, Immanuel Bloch1, and Timon Hilker1,3 — 1Max Planck Institute of Quantum Optics, Garching, Germany — 2Université Paris-Saclay, Institut d*Optique Graduate School, CNRS, Laboratoire Charles Fabry, Palaiseau 91127, France — 3Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK
Strongly-correlated materials show rich phase diagrams at low temperatures and finite dopings. The Fermi-Hubbard model and its variations are believed to describe many of these phases, including cuprate high-Tc superconductivity and the pseudogap phase. We have implemented a single-site and spin resolved quantum gas microscope with an optical superlattice. Control over the doping and temperature has allowed us to explore large regions of the Fermi-Hubbard phase diagram and find indications of the pseudogap phase by measuring spin and dopant-spin correlations up to fifth order. Additionally, atoms in the superlattice can be isolated into an array of double wells, which we dynamically control to implement two-qubit collisional gates with excellent fidelity. This paves the way for fermionic quantum computation.
Keywords: Fermi-Hubbard model; Pseudogap; Fermionic quantum computation; Quantum Simulation