Exploring an ultracold Fermi-Fermi mixture: interspecies Feshbach resonances of $^6$ Li- $^{40}$ KExploring an ultracold Fermi-Fermi mixture: interspecies Feshbach resonances of $^6$Li-$^{40}$K

Florian Schreck

Bulletin of the American Physical SocietyMar 13, 20080 citations

Photoassociation spectroscopy and Atom-Molecule Coherence in Ultracold Li-Yb Mixtures

Jun Hui See Toh, Alaina Green, Khang Ton +1 more

Bulletin of the American Physical SocietyMay 31, 20180 citations

Magnetically Tunable Feshbach Resonances in Ultracold Li-Yb Mixtures

Daniel A. Brue, Jeremy M. Hutson

We investigate the possibility of forming Li+Yb ultracold molecules by magnetoassociation in mixtures of ultracold atoms. We find that magnetically tunable Feshbach resonances exist, but are extremely narrow for even-mass ytterbium isotopes, which all have zero spin. For odd-mass Yb isotopes, however, there is a new mechanism due to hyperfine coupling between the electron spin and the Yb nuclear magnetic moment. This mechanism produces Feshbach resonances for fermionic Yb isotopes that can be more than 2 orders of magnitude larger than for the bosonic counterparts.We investigate the possibility of forming Li+Yb ultracold molecules by magnetoassociation in mixtures of ultracold atoms. We find that magnetically tunable Feshbach resonances exist, but are extremely narrow for even-mass ytterbium isotopes, which all have zero spin. For odd-mass Yb isotopes, however, there is a new mechanism due to hyperfine coupling between the electron spin and the Yb nuclear magnetic moment. This mechanism produces Feshbach resonances for fermionic Yb isotopes that can be more than 2 orders of magnitude larger than for the bosonic counterparts.

arXiv:1108.1827Physical Review LettersJan 25, 201280 citations

Feshbach resonances in the ultracold 6Li-173Yb mixtures

Hui Li, Ming Li, Svetlana Kotochigova

Bulletin of the American Physical SocietyMay 29, 20190 citations

Feshbach resonances of large-mass-imbalance Er-Li mixtures

F. Schäfer, N. Mizukami, Yoshiro Takahashi

We report on the experimental observation of Feshbach resonances in large-mass-imbalance mixtures of erbium (Er) and lithium (Li). All combinations of $^{168}\mathrm{Er}, ^{166}\mathrm{Er}$ , and $^{7}\mathrm{Li}, ^{6}\mathrm{Li}$ are cooled to temperatures of a few microkelvin, partially by means of sympathetic cooling together with ytterbium (Yb) as a third mixture component. The Er-Li inelastic interspecies collisional properties are studied for magnetic fields up to $680\phantom{\rule{0.28em}{0ex}}\mathrm{G}$ . In all cases, resonant interspecies loss features, indicative of Feshbach resonances, have been observed. While most resonances have sub-Gauss widths, a few of them are broad and feature widths of several Gauss. Those broad resonances are a key to the realization of ultracold Er-Li quantum gas mixtures with tunable interactions.We report on the experimental observation of Feshbach resonances in large-mass-imbalance mixtures of erbium (Er) and lithium (Li). All combinations of $^{168}\mathrm{Er}, ^{166}\mathrm{Er}$, and $^{7}\mathrm{Li}, ^{6}\mathrm{Li}$ are cooled to temperatures of a few microkelvin, partially by means of sympathetic cooling together with ytterbium (Yb) as a third mixture component. The Er-Li inelastic interspecies collisional properties are studied for magnetic fields up to $680\phantom{\rule{0.28em}{0ex}}\mathrm{G}$. In all cases, resonant interspecies loss features, indicative of Feshbach resonances, have been observed. While most resonances have sub-Gauss widths, a few of them are broad and feature widths of several Gauss. Those broad resonances are a key to the realization of ultracold Er-Li quantum gas mixtures with tunable interactions.

arXiv:2111.08130Physical Review AJan 24, 202222 citations

Exploring an ultracold Fermi-Fermi mixture: interspecies Feshbach resonances of

^6

Li-

^{40}

We report on the experimental observation of Feshbach resonances in large-mass-imbalance mixtures of erbium (Er) and lithium (Li). All combinations of

^{168}\mathrm{Er}, ^{166}\mathrm{Er}

, and

^{7}\mathrm{Li}, ^{6}\mathrm{Li}

are cooled to temperatures of a few microkelvin, partially by means of sympathetic cooling together with ytterbium (Yb) as a third mixture component. The Er-Li inelastic interspecies collisional properties are studied for magnetic fields up to

680\phantom{\rule{0.28em}{0ex}}\mathrm{G}

. In all cases, resonant interspecies loss features, indicative of Feshbach resonances, have been observed. While most resonances have sub-Gauss widths, a few of them are broad and feature widths of several Gauss. Those broad resonances are a key to the realization of ultracold Er-Li quantum gas mixtures with tunable interactions.