Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session M08: Quantum Gases in Reduced Dimensions
2:00 PM–3:48 PM,
Wednesday, June 7, 2023
Room: 206 C
Chair: David Weiss, Penn State University
Abstract: M08.00008 : Associating emergent s-wave dimers along strongly confined directions of a spin-polarized Fermi gas
3:24 PM–3:36 PM
Presenter:
Kevin G. S. Xie
(Univ of Toronto)
Authors:
Kevin G. S. Xie
(Univ of Toronto)
Kenneth G Jackson
(Univ of Toronto)
Colin J Dale
(Univ of Toronto)
Jeffrey Maki
(Pitaevskii BEC Center, CNR-INO and Università di Trento)
Shizhong Zhang
(Hong Kong University)
Joseph H Thywissen
(Univ of Toronto)
We measure the binding energies of quasi-2D dimers using a radio-frequency (rf) spin-flip association protocol. Measurements are performed in two confinement geometries, whose common features demonstrate the appearance of emergent s-wave dimers as resulting from the hybridization of orbital bands with the p-wave dimer in the confinement direction. The results are compared to a model of quasi-2D scattering that includes band excitations.
In a second set of measurements, we study the strengths of resonantly enhanced interactions for each quasi-2D dimer by measuring how high-frequency rf transfer rates depend on magnetic field, lattice confinement, and population in the excited bands. The resulting atom-atom correlations are interpreted through a set of universal relations, revealing the 2D contact parameters. These results extend the paradigm previously established in quasi-one-dimensional systems [1], and provide a comprehensive framework for engineering exotic interactions with orbital dynamics.
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