Bulletin of the American Physical Society
53rd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 67, Number 7
Monday–Friday, May 30–June 3 2022; Orlando, Florida
Session E05: Degenerate Fermi Gas I
2:30 PM–4:30 PM,
Tuesday, May 31, 2022
Room: Salon 9/10
Chair: Sruthi Venkataramanababu, Northwestern University
Abstract: E05.00004 : Realization of resonantly interacting Fermi mixtures of 6Li and 53Cr atoms*
3:06 PM–3:18 PM
Presenter:
Alessio Ciamei
(Consiglio Nazionale delle Ricerche (CNR-INO))
Authors:
Alessio Ciamei
(Consiglio Nazionale delle Ricerche (CNR-INO))
Stefano Finelli
(University of Florence)
Massimo Inguscio
(CNR-INO and Campus Bio-Medico University of Rome)
Andreas Trenkwalder
(CNR-INO)
Andrea Simoni
(IPR - Institut de Physique de Rennes)
Matteo Zaccanti
(CNR-INO and LENS)
Employing a set of 50 Feshbach resonances, observed in several spin combinations between 0G and 1500G, we develop an accurate quantum collisional model for our system. From this we derive scattering lengths and unobserved resonance locations for 6Li-53Cr, and provide accurate predictions for the collisional properties of other Li-Cr isotopic pairs.
A set of strong s-wave resonances, essentially immune to two-body inelastic losses, are identified at about 1.4kG.
We measure the magnetic field width of one among these features to be about 0.5G, in agreement with our model prediction.
Exploiting the same resonance, we show resonant tuning of inter-species elastic interactions, characterized through radio-frequency spectroscopy protocols.
Finally, we discuss our all-optical route to reach simultaneous quantum degeneracy in our mixture, comprising about 2.2x105 Li atoms at T/TF=0.3 and 6x104 Cr atoms at T/TF=0.9, respectively.
Our work paves the way to the observation of novel few- and many-body phenomena in mass-imbalanced Fermi gases, and to the realization of ultracold samples of LiCr ground-state molecules featuring both electric and magnetic dipole moments.
*This work was supported by the ERC through grant No. 637738 PoLiChroM, by the Italian MIUR through the FARE Grant No. R168HMHFYM, and by the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant Agreement No. 894442.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700