Double-degenerate Fermi mixtures of 6Li and 53Cr atoms

Year: 2022

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

Autors Affiliation: CNR, Ist Nazl Ott, I-50019 Sesto Fiorentino, Italy; Univ Firenze, European Lab Nonlinear Spect, I-50019 Sesto Fiorentino, Italy; Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy; Campus Biomed Univ Rome, Dept Engn, I-00128 Rome, Italy.

Abstract: We report on the realization of a degenerate mixture of ultracold fermionic lithium and chromium atoms. Based on an all-optical approach, with an overall duty cycle of about 13 s, we produce large and degenerate samples of more than 2×105 6Li atoms and 105 53Cr atoms, with both species exhibiting normalized temperatures of about T/TF = 0.25. Additionally, through the exploitation of a crossed bichromatic optical dipole trap, we can controllably vary the density and degree of degeneracy of the two components almost independently and widely tune the lithium-to-chromium density ratio. Our 6Li -53Cr Fermi mixture opens the way to the investigation of a variety of exotic few-and many-body regimes of quantum matter and it appears as an optimally suited system to realize ultracold paramagnetic polar molecules, characterized by both electric and magnetic dipole moments. Ultimately, our strategy also provides an efficient pathway to produce dipolar Fermi gases, or spin mixtures, of ultracold 53Cr atoms.

Journal/Review: PHYSICAL REVIEW A

Volume: 106 (5)      Pages from: 53318-1  to: 53318-13

More Information: We thank D. Petrov, B. Laburthe-Tolra, A. Simoni, and the LENS Quantum Gases group for useful discussions. 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 H2020 Marie Sklodowska-Curie Grant Agreement No. 894442 (CriLiN) (fellowship to A. Ciamei) .
KeyWords: Gas
DOI: 10.1103/PhysRevA.106.053318

ImpactFactor: 2.900
Citations: 9
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