Bonn 2025 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 66: Ultracold Matter (Fermions) II (joint session Q/A)
Q 66.5: Talk
Friday, March 14, 2025, 12:15–12:30, HS V
Quantum gas microscopy of strongly correlated states in the pseudogap phase of the Fermi-Hubbard model — •Thomas Chalopin for the MPQ Fermi-Hubbard microscope experiment and theory collaboration — Université Paris-Saclay, Institut d’Optique Graduate School, CNRS, Laboratoire Charles Fabry, Palaseau, France — Max Planck Institute of Quantum Optics, Garching, Germany
In correlated materials such as high-TC cuprate superconductors, strong electron-electron interactions give rise to a rich low-temperature phase diagram which heavily depends on doping. The pseudogap phase, in particular, emerges in the underdoped region of cuprates below a temperature T*, and is often considered to be a precursor of the superconducting state at lower temperature. Numerous theoretical and numerical studies have furthermore established the presence of a pseudogap in the Fermi-Hubbard model, a simplified model of interacting lattice fermions that captures some of the key properties of cuprates.
In this talk, I will present a systematic exploration of the Fermi-Hubbard model using a quantum gas microscope in a regime of parameters associated to the opening of a pseudogap. We measure sizable spin and charge connected correlations up to order 5 and reveal the emergence of a strongly correlated regime at low-temperature and low-doping which matches well theoretical predictions for T*.
Keywords: Fermi-Hubbard model; Quantum simulation; Quantum gas microscope; Pseudogap