Tunable field-linked s-wave interactions in dipolar fermi mixtures

article Tunable field-linked s-wave interactions in dipolar fermi mixtures published yes Jinglun Li author ff19510a-0d2c-11ef-b018-c338ad2f4325 Georgios Koutentakis author d7b23d3a-9e21-11ec-b482-f76739596b95 Mateja Hrast author 48dbb294-2a9c-11ef-905d-f56be71f0e5d Mikhail Lemeshko author 37CB05FA-F248-11E8-B48F-1D18A9856A870000-0002-6990-7802 Andreas Schindewolf author Ragheed Al Hyder author d1c405be-ae15-11ed-8510-ccf53278162e MiLe department Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions project Polarons in Lead Halide Perovskites project Spin mixtures of degenerate fermions are a cornerstone of quantum many-body physics, enabling superfluidity, polarons, and rich spin dynamics through s-wave scattering resonances. Combining them with strong, long-range dipolar interactions provides highly flexible control schemes promising even more exotic quantum phases. Recently, microwave shielding gave access to spin-polarized degenerate samples of dipolar fermionic molecules, where tunable p-wave interactions were enabled by field-linked resonances available only by compromising the shielding (due to experimental limitations). Here, we study the scattering properties of a fermionic dipolar spin mixture and show that a universal s-wave resonance is readily accessible without compromising the shielding. We develop a universal description of the tunable s-wave interaction and weakly bound tetratomic states based on the microwave-field parameters. The s-wave resonance paves the way to stable, controllable and strongly-interacting dipolar spin mixtures of deeply degenerate fermions and supports favorable conditions to reach this regime via evaporative cooling. https://research-explorer.ista.ac.at/download/22100/22133/2026_CommunicationsPhysics_Li.pdf application/pdfno Springer Nature2026 eng Communications Physics 2399-3650 2506.2331810.1038/s42005-026-02578-8 9 J. Li, G. Koutentakis, M. Hrast, M. Lemeshko, A. Schindewolf, R. Al Hyder, Communications Physics 9 (2026). Li, Jinglun, et al. “Tunable Field-Linked s-Wave Interactions in Dipolar Fermi Mixtures.” Communications Physics, vol. 9, 201, Springer Nature, 2026, doi:<a href="https://doi.org/10.1038/s42005-026-02578-8">10.1038/s42005-026-02578-8</a>. Li, J., Koutentakis, G., Hrast, M., Lemeshko, M., Schindewolf, A., & Al Hyder, R. (2026). Tunable field-linked s-wave interactions in dipolar fermi mixtures. Communications Physics. Springer Nature. <a href="https://doi.org/10.1038/s42005-026-02578-8">https://doi.org/10.1038/s42005-026-02578-8</a> Li J, Koutentakis G, Hrast M, Lemeshko M, Schindewolf A, Al Hyder R. Tunable field-linked s-wave interactions in dipolar fermi mixtures. Communications Physics. 2026;9. doi:<a href="https://doi.org/10.1038/s42005-026-02578-8">10.1038/s42005-026-02578-8</a> Li J, Koutentakis G, Hrast M, Lemeshko M, Schindewolf A, Al Hyder R. 2026. Tunable field-linked s-wave interactions in dipolar fermi mixtures. Communications Physics. 9, 201. Li, Jinglun, Georgios Koutentakis, Mateja Hrast, Mikhail Lemeshko, Andreas Schindewolf, and Ragheed Al Hyder. “Tunable Field-Linked s-Wave Interactions in Dipolar Fermi Mixtures.” Communications Physics. Springer Nature, 2026. <a href="https://doi.org/10.1038/s42005-026-02578-8">https://doi.org/10.1038/s42005-026-02578-8</a>. J. Li, G. Koutentakis, M. Hrast, M. Lemeshko, A. Schindewolf, and R. Al Hyder, “Tunable field-linked s-wave interactions in dipolar fermi mixtures,” Communications Physics, vol. 9. Springer Nature, 2026. 221002026-06-21T22:02:58Z2026-06-24T06:10:44Z