Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 28: Fermionic Quantum Gases I (joint session Q/A)
Q 28.8: Vortrag
Mittwoch, 13. März 2024, 12:45–13:00, HS 1199
Exploring stripe phase in Fermi-Hubbard model with a quantum gas microscope — •Si Wang1,2, Dominik Bourgund1,2, Thomas Chalopin1,2, Petar Bojović1,2, Titus Franz1,2, Sarah Hirthe4, Immanuel Bloch1,2,3, and Timon Hilker1,2 — 1Max-Planck Institute of Quantum Optics, Garching, Germany — 2Munich Center for Quantum Science and Technology, Munich, Germany — 3Ludwig Maximilian University of Munich, Munich, Germany — 4ICFO - The Institute of Photonic Sciences, Castelldefels, Spain
The Fermi-Hubbard model is crucial for understanding physics in quasi 2D layers of high-Tc cuprate superconductors. Investigating the profound connection between d-wave superconductivity and stripes, essential elements in cuprate ordered phases, promises valuable insights. In the isotropic Fermi-Hubbard model, the interplay between the kinetic energy of the dopants and the magnetic energy of the AFM spin order governs the system and reduces the energy scale for stripe order well beyond the reach of state-of-the-art cold-atom quantum simulators. To address this, we engineered a mixed-dimensional system, selectively suppressing particle tunneling along one direction while maintaining 2D spin interactions. This innovative approach tilts the balance in the competition between kinetic and magnetic energies, and thus elevates characteristic energy scales for collective effects, allowing us to observe signatures of stripes in our quantum simulator. Notably, recent discoveries indicate that mixed-dimensional systems can exhibit a distinct manifestation of high-Tc superconductivity, emphasizing the significance of our research endeavors in advancing this field.
Keywords: quantum simulator; Fermi-Hubbard model; mixed-dimensional system; stripe phase