Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 23: Cold Molecules (joint session MO/Q)
Q 23.8: Talk
Tuesday, March 3, 2026, 13:00–13:15, P 105
Towards a Dipolar BCS-BEC Crossover — •Eugen Dizer1, Arthur Christianen2, Xin Chen1, and Richard Schmidt1 — 1Institut für Theoretische Physik, Universität Heidelberg, 69120 Heidelberg, Germany — 2Institute for Theoretical Physics, ETH Zürich, Zürich, Switzerland
Dipolar Fermi gases are expected to show exotic phases of matter, such as the supersolid and the Wigner crystal phase. Their anisotropic long-range interactions make them also highly relevant for the study of unconventional superconductivity. In this work, we focus on the case of highly population-imbalanced dipolar Fermi gases to explore their few- and many-body physics. We analyze the quantum scattering of a single impurity in a dipolar Fermi sea, highlighting key differences from conventional short-range interaction models. Additionally, we discuss implications for the polaron-to-molecule transition and Anderson's orthogonality catastrophe, introducing a new theoretical framework to address this problem. Our results provide insights into the interplay between s- and p-wave pairing, and the emergence of supersolid phases, in the dipolar BCS-BEC crossover. We propose an experimental protocol to test the predictions in this work using ultracold molecules.
Keywords: Ultracold Molecules; Dipolar Fermi Gases; Dipolar Scattering; Impurity Physics; Many-Body Physics