Exploring Ultracold Collisions in 6Li-53Cr Fermi Mixtures: Feshbach Resonances and Scattering Properties of a Novel Alkali-Transition Metal System

Year: 2022

Authors: Ciamei A., Finelli S., Trenkwalder A., Inguscio M., Simoni A., Zaccanti M.

Autors Affiliation: Consiglio Nazl Ric CNR, Ist Nazl Ott, I-50019 Sesto Fiorentino, Italy; Univ Firenze, European Lab Nonlinear Spect LENS, I-50019 Sesto Fiorentino, Italy; Campus Biomed Univ Rome, Dept Engn, I-00128 Rome, Italy; Univ Rennes, CNRS, IPR Inst Phys Rennes, UMR 6251, F-35000 Rennes, France.

Abstract: We investigate ultracold collisions in a novel mixture of Li-6 and Cr-53 fermionic atoms, discovering more than 50 interspecies Feshbach resonances via loss spectroscopy. Building a full coupled-channel model, we unambiguously characterize the Li-6-Cr-53 scattering properties and yield predictions for other isotopic pairs. In particular, we identify various Feshbach resonances that enable the controlled tuning of elastic s- and p-wave Li-6-Cr-53 interactions. Our studies thus make lithium-chromium mixtures emerge as optimally suited platforms for the experimental search of elusive few- and many-body regimes of highly correlated fermionic matter, and for the realization of a new class of ultracold polar molecules possessing both electric and magnetic dipole moments.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 129 (9)      Pages from: 93402-1  to: 93402-7

More Information: We thank D. Petrov, J. Szczepkowski, E. Tiemann, M. Tomza, K. Zaremba-Kopczyk, and the LENS Quantum Gases group for fruitful discussions, and G. Modugno for useful suggestions and a critical reading of the manuscript. This work was supported by the European Research Council under Grant No. 637738 (PoLiChroM), by the Italian MIUR through the FARE Grant No. R168HMHFYM (P-HeLiCS), and by the EU’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant No. 894442 (CriLiN) [fellowship to A. C.].
KeyWords: Atoms
DOI: 10.1103/PhysRevLett.129.093402

Citations: 10
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