Quantum Degenerate Mixtures of Cs and Yb

Abstract

We report the production of quantum degenerate Bose-Bose mixtures of Cs and Yb with both attractive (Cs + ${}^{174}$Yb) and repulsive (Cs + ${}^{170}$Yb) interspecies interactions. Dual-species evaporation is performed in a bichromatic optical dipole trap that combines light at 1070 nm and 532 nm to enable control of the relative trap depths for Cs and Yb. Maintaining a trap which is shallower for Yb throughout the evaporation leads to highly efficient sympathetic cooling of Cs for both isotopic combinations at magnetic fields close to the Efimov minimum in the Cs three-body recombination rate at around 22 G. For Cs + ${}^{174}$Yb, we produce quantum mixtures with typical atom numbers of $N_{\mathrm{Yb}}\sim 5\times 10^4$ and $N_{\mathrm{Cs}}\sim 5\times 10^3$. We find that the attractive interspecies interaction (characterised by the scattering length $a_{\mathrm{CsYb}}=-75a_0$) is stabilised by the repulsive intraspecies interactions. For Cs + ${}^{170}$Yb, we produce quantum mixtures with typical atom numbers of $N_{\mathrm{Yb}}\sim 4\times 10^4$, and $N_{\mathrm{Cs}}\sim 1\times 10^4$. Here, the repulsive interspecies interaction ($a_{\mathrm{CsYb}}=96a_0$) can overwhelm the intraspecies interactions, such that the mixture sits in a region of partial miscibility.

arXiv comment12 pages, 10 figures. v2: minor changes to figures, text and references following review

References in corpus (88)

• A High Phase-Space-Density Gas of Polar Molecules
• A toolbox for lattice spin models with polar molecules
• Evidence for Efimov quantum states in an ultracold gas of cesium atoms
• Quantum Mechanical Stabilization of a Collapsing Bose-Bose Mixture
• Quantum liquid droplets in a mixture of Bose-Einstein condensates
• Self-bound quantum droplets in atomic mixtures
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• Two-species mixture of quantum degenerate Bose and Fermi gases
• A two atomic species superfluid
• Creation of an ultracold gas of ground-state ${}^{23}{\mathrm{Na}}^{87}\mathrm{Rb}$ molecules
• Generation of dark-bright soliton trains in superfluid-superfluid counterflow
• Degenerate Fermi Gases of Ytterbium
• Feshbach resonances in rubidium 87: Precision measurement and analysis
• Observation of Quantum Droplets in a Heteronuclear Bosonic Mixture
• Bose-Fermi Mixtures in a Three-dimensional Optical Lattice
• Realization of SU(2)*SU(6) Fermi System
• A Mixture of Bose and Fermi Superfluids
• Three-body recombination at large scattering lengths in an ultracold atomic gas
• Atomic Bose-Fermi mixtures in an optical lattice
• Quantum degenerate two-species Fermi-Fermi mixture coexisting with a Bose-Einstein condensate
• Dual-Species Bose-Einstein Condensate of ${}^{87}$Rb and ${}^{133}$Cs
• Enhanced sensitivity to variation of the fine structure constant and m_p/m_e in diatomic molecules
• Two-color photoassociation spectroscopy of ytterbium atoms and the precise determinations of s-wave scattering lengths
• Lasercooled RaF as a promising candidate to measure molecular parity violation
• Long-Lived Ultracold Molecules with Electric and Magnetic Dipole Moments
• Observation of Efimov Resonances in a Mixture with Extreme Mass Imbalance
• Geometric scaling of Efimov states in a ${}^6\text{Li}$-${}^{133}\text{Cs}$ mixture
• Tuning of heteronuclear interactions in a quantum-degenerate Fermi-Bose mixture
• Observation of magnetically tunable Feshbach resonances in ultracold ${}^{23}$Na${}^{40}$K+${}^{40}$K collisions
• Dipolar Quantum Mixtures of Erbium and Dysprosium Atoms
• Sympathetic Cooling with Two Atomic Species in an Optical Trap
• Fermion-Mediated Interactions Between Bosonic Atoms
• All-Optical Formation of Quantum Degenerate Mixtures
• Control of the interaction in a Fermi-Bose mixture
• Bose-Einstein Condensation of an Ytterbium Isotope
• Quantum degenerate mixtures of strontium and rubidium atoms
• Ultracold RbSr molecules can be formed by magnetoassociation
• Feshbach resonances, weakly bound molecular states and coupled-channel potentials for cesium at high magnetic fields
• Two-Element Mixture of Bose and Fermi Superfluids
• Observation of two-species vortex lattices in a mixture of mass-imbalance Bose and Fermi superfluids
• Phase Separation and Dynamics of two-component Bose-Einstein condensates
• Tunable dual-species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb
• Binary Quantum Turbulence Arising from Countersuperflow Instability in Two-Component Bose-Einstein Condensates
• Collisional Stability of 40K Immersed in a Strongly Interacting Fermi Gas of 6Li
• Precision Measurement of Transition Matrix Elements via Light Shift Cancellation
• Optimized production of a cesium Bose-Einstein condensate
• Observation of Feshbach resonances between alkali and closed-shell atoms
• A double species ${}^{23}$Na and ${}^{87}$Rb Bose-Einstein condensate with tunable miscibility via an interspecies Feshbach resonance
• Magnetically tunable Feshbach resonances in ultracold Li-Yb mixtures
• The prospects of forming ultracold molecules in ${}^2\Sigma$ states by magnetoassociation of alkali-metal atoms with Yb
• Bose-Einstein condensate in gases of rare atomic species
• External field control of collective spin excitations in an optical lattice of ${}^2\Sigma$ molecules
• Rapid Cooling to Quantum Degeneracy in Dynamically Shaped Atom Traps
• Production of a degenerate Fermi-Fermi mixture of dysprosium and potassium atoms
• Shielding ${}^2\Sigma$ ultracold dipolar molecular collisions with electric fields
• Scattering lengths in isotopologues of the RbYb system
• Heteronuclear Efimov scenario with positive intraspecies scattering length
• Degenerate Bose-Fermi mixtures of rubidium and ytterbium
• Topological superfluid in a Fermi-Bose mixture with a high critical temperature
• Bose-Einstein condensation of 162Dy and 160Dy
• Infrared-dressed entanglement of cold open-shell polar molecules for universal matchgate quantum computing
• Phase separation and collapse in Bose-Fermi mixtures with a Feshbach resonance
• Ultracold Heteronuclear Mixture of Ground and Excited State Atoms
• Feshbach resonances in ultracold 85Rb
• Feshbach resonances in $p$-wave three-body recombination within Fermi-Fermi mixtures of open-shell ${}^6$Li and closed-shell ${}^{173}$Yb atoms
• A new quantum gas apparatus for ultracold mixtures of K and Cs and KCs ground-state molecules
• Reaching Fermi degeneracy in two-species optical dipole traps
• Two-photon photoassociation spectroscopy of CsYb: ground-state interaction potential and interspecies scattering lengths
• Sympathetic cooling in a mixture of diamagnetic and paramagnetic atoms
• A high phase-space density mixture of ${}^{87}$Rb and ${}^{133}$Cs: towards ultracold heteronuclear molecules
• Splitting of singly and doubly quantized composite vortices in two-component Bose-Einstein condensates
• Bose-Fermi mixtures in an optical lattice
• Experimental realization of ultracold Yb-${}^7\mathrm{Li}$ mixtures in mixed dimensions
• Production of ultracold Cs*Yb molecules by photoassociation
• Direct loading of a large Yb MOT on the ${}^1{S}_0\to {}^3{P}_1$ transition
• Production and characterization of a dual species magneto-optical trap of cesium and ytterbium
• Interspecies thermalization in an ultracold mixture of Cs and Yb in an optical trap
• A Three-Dimensional Optical Lattice of Ytterbium and Lithium Atomic Mixture
• Dual Hg-Rb magneto-optical trap
• Sensitive imaging of electromagnetic fields with paramagnetic polar molecules
• A versatile dual-species Zeeman slower for caesium and ytterbium
• Magnetic Feshbach resonances in ultracold collisions between Cs and Yb atoms
• Double Degenerate Bose-Fermi Mixture of Strontium and Lithium
• Prospects of forming high-spin polar molecules from ultracold atoms
• A mixed dimensional Bose polaron
• An ultracold, optically trapped mixture of {87}Rb and metastable {4}He atoms