We realize simultaneous quantum degeneracy in mixtures consisting of the alkali and alkaline-earth-like atoms Li and Yb. This is accomplished within an optical trap by sympathetic cooling of the fermionic isotope ⁶Li with evaporatively cooled bosonic ¹⁷⁴Yb and, separately, fermionic ¹⁷³Yb. Using cross-thermalization studies, we also measure the elastic s-wave scattering lengths of both Li-Yb combinations, |a(⁶Li-¹⁷⁴Yb)| = 1.0 ± 0.2 nm and |a(⁶Li-¹⁷³Yb)| = 0.9 ± 0.2 nm. The equality of these lengths is found to be consistent with mass-scaling analysis. The quantum degenerate mixtures of Li and Yb, as realized here, can be the basis for creation of ultracold molecules with electron spin degrees of freedom, studies of novel Efimov trimers, and impurity probes of superfluid systems.
We characterize the ground states of spin-1 Bose-Einstein condensates under
No external magnetic field. For ferromagnetic systems, we show the validity of
The so-called single-mode approximation (SMA), and hence they are effectively
One-component systems. For antiferromagnetic systems, there are two...
We have performed time-resolved measurements of Landau-Zener tunneling
Of Bose-Einstein condensates in accelerated optical lattices, clearly resolving
The steplike time dependence of the band populations. The use of different
Protocols enabled us to access the tunneling probability, in two different...
We explore an exotic strongly-correlated system
Of Interacting Dual Mott Insulators of bosons and fermions. We reveal that an
Inter-species interaction between bosons and fermions drastically modifies each
Mott insulator, causing effects that include melting, generation of composite
Particles, an an...
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