Triply degenerate quantum mixture of 41K, 40K and 6Li

Cheng-Hsun Wu
(Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA)

Ibon Santiago
(Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA)

Jee Woo Park
(Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA)

Peyman Ahmadi
(Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA)

Martin Zwierlein
(Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA)

We report the observation of a triply quantum degenerate mixture of $^{41}$K, $^{40}$K and $^{6}$Li atoms. It is demonstrated that bosonic $^{41}$K atom is an efficient coolant for sympathetic cooling of fermionic $^{40}$K and $^6$Li atoms. We also present our investigation of $^{41}$K and $^{40}$K, a Bose-Fermi mixture where a 12 G s-wave resonance is observed. Negligible differential gravitational sag between potassium isotopes makes this resonance an excellent candidate for studying unexplored properties of Bose- Fermi mixtures. The $^{40}$K and $^6$Li mixture provides access to strongly correlated Fermi-Fermi mixtures with imbalanced masses.

*This work was supported by the NSF, AFOSR-MURI, AFOSR-YIP, ARO-MURI, a grant from the Army Research Office with funding from the DARPA OLE program, the David and Lucille Packard Foundation and the Alfred P. Sloan Foundation.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.DAMOP.P1.3

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Bulletin of the American Physical Society

42nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics

Volume 56, Number 5

Monday–Friday, June 13–17, 2011; Atlanta, Georgia

Session P1: Degenerate Quantum Gases and Alkaline Earth Atoms

Abstract: P1.00003 : Triply degenerate quantum mixture of 41K, 40K and 6Li*

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