Publikation: Emergent 𝑠-wave interactions in orbitally active quasi-two-dimensional Fermi gases
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We investigate the scattering properties and bound states of a quasi-two-dimensional (Q2D) spin-polarized Fermi gas near a 𝑝-wave Feshbach resonance. Strong confinement promotes the out-of-plane spatial wave function to an orbital degree of freedom with an energetic gap. Employing radio-frequency (rf) spectroscopy, we observe both power-law scaling and the dimensional-crossover feature that are indicative of an emergent 𝑠-wave interaction channel. Additionally, we demonstrate the formation of two types of low-energy dimers, possessing either 𝑠-wave or 𝑝-wave symmetry, through rf spin-flip association from an orbital mixture. Our observations are compared to predictions from a Q2D scattering model that incorporates exchange-antisymmetric orbital pair wave functions. These findings underscore how gapped orbital degrees of freedom can control scattering symmetry in strongly confined ultracold gases.
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DALE, Colin J., Kevin G. S. XIE, Kiera POND GREHAN, Shizhong ZHANG, Jeffrey MAKI, Joseph H. THYWISSEN, 2024. Emergent 𝑠-wave interactions in orbitally active quasi-two-dimensional Fermi gases. In: Physical Review A. American Physical Society (APS). 2024, 110(5), L051302. ISSN 2469-9926. eISSN 2469-9934. Verfügbar unter: doi: 10.1103/physreva.110.l051302BibTex
@article{Dale2024-11-15Emerg-71803, year={2024}, doi={10.1103/physreva.110.l051302}, title={Emergent 𝑠-wave interactions in orbitally active quasi-two-dimensional Fermi gases}, number={5}, volume={110}, issn={2469-9926}, journal={Physical Review A}, author={Dale, Colin J. and Xie, Kevin G. S. and Pond Grehan, Kiera and Zhang, Shizhong and Maki, Jeffrey and Thywissen, Joseph H.}, note={Article Number: L051302} }
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