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QI: Fachverband Quanteninformation
QI 22: Quantum Simulation
QI 22.6: Vortrag
Mittwoch, 12. März 2025, 15:45–16:00, HS IV
Quantum Simulation of Excitons in Dipolar Fermi Gases within Optical Lattices — •Florian Hirsch1, Oriana Diessel2, Rafal Oldziejewski3, and Richard Schmidt1 — 1Institute for Theoretical Physics, Heidelberg University, Philosophenweg 16, 69120 Heidelberg, Germany — 2ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, US — 3Max-Planck-Institute of Quantum Optics, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany
Ultracold atoms have emerged as a powerful platform for simulating condensed matter phenomena, offering insights into effects difficult to access in solid-state systems. Inspired by the robust excitonic physics found in two-dimensional materials, we investigate the formation of analogues of excitons in a system of single-component Fermions with strong dipole-dipole interactions. Using a hexagonal lattice with an energy offset between the trigonal sublattices to open a non-zero band gap at the K/K' points, we use variational methods to predict the existence of bound atom-hole pairs (atomic excitons) in cold atom systems. To probe these states, we propose an experimental procedure using time-of-flight spectroscopy and suggest applications for high-resolution quantum gas microscopes. This work lays the foundation for simulating more complex states with the exciton as building block, opening new avenues for the exploration of strongly correlated quantum phenomena in both semiconductor systems and ultracold atoms.
Keywords: Dipolar Fermi Gas; Optical Lattice; Ultracold Atoms