Quantum degenerate mixtures of strontium and rubidium atoms

Abstract

We report on the realization of quantum degenerate gas mixtures of the alkaline-earth element strontium with the alkali element rubidium. A key ingredient of our scheme is sympathetic cooling of Rb by Sr atoms that are continuously laser cooled on a narrow linewidth transition. This versatile technique allows us to produce ultracold gas mixtures with a phase-space density of up to 0.06 for both elements. By further evaporative cooling we create double Bose-Einstein condensates of 87Rb with either 88Sr or 84Sr, reaching more than 10^5 condensed atoms per element for the 84Sr-87Rb mixture. These quantum gas mixtures constitute an important step towards the production of a quantum gas of polar, open-shell RbSr molecules.

9 pages, 5 figures

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• Many-Body Physics with Ultracold Gases
• A High Phase-Space-Density Gas of Polar Molecules
• Quantum Gas of Deeply Bound Ground State Molecules
• Ultracold Molecules in the Ro-Vibrational Triplet Ground State
• Quantum degenerate two-species Fermi-Fermi mixture coexisting with a Bose-Einstein condensate
• Dual-Species Bose-Einstein Condensate of ${}^{87}$Rb and ${}^{133}$Cs
• Species-specific optical lattices
• Bose-Einstein condensation of alkaline earth atoms: ${}^{40}${Ca}
• Scattering in Mixed Dimensions with Ultracold Gases
• Topological phases in ultracold polar-molecule quantum magnets
• Low-energy three-body dynamics in binary quantum gases
• Creation of ultracold Sr2 molecules in the electronic ground state
• Two-photon photoassociative spectroscopy of ultracold 88-Sr
• Production of a dual-species Bose-Einstein condensate of Rb and Cs atoms
• Production of quantum degenerate strontium gases: Larger, better, faster, colder
• External field control of collective spin excitations in an optical lattice of ${}^2\Sigma$ molecules
• Crystalline phase of strongly interacting Fermi mixtures
• Fourier-transform spectroscopy of Sr2 and revised ground state potential
• Production of quantum degenerate mixtures of ytterbium and lithium with controllable inter-species overlap
• Cooling and trapping of ultra-cold strontium isotopic mixtures

Cited by in corpus (89)

• New frontiers with quantum gases of polar molecules
• Controlling the scattering length of ultracold dipolar molecules
• Phase Separation and Dynamics of two-component Bose-Einstein condensates
• Tunable dual-species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb
• Strongly interacting ultracold polar molecules
• Observation of Feshbach resonances between alkali and closed-shell atoms
• Controlling a quantum gas of polar molecules in an optical lattice
• Shielding ${}^2\Sigma$ ultracold dipolar molecular collisions with electric fields
• Scattering lengths in isotopologues of the RbYb system
• Adimensional theory of shielding in ultracold collisions of dipolar rotors
• Degenerate Bose-Fermi mixtures of rubidium and ytterbium
• Quantum turbulence in quantum gases
• Ultracold Heteronuclear Mixture of Ground and Excited State Atoms
• Thermal suppression of phase separation in condensate mixtures
• Fluctuations and quantum self-bound droplets in a dipolar Bose-Bose mixture
• Radiative deflection of a BaF molecular beam from the optical cycling
• Study of the inter-species interactions in an ultracold dipolar mixture
• Quantum and thermal fluctuations in two-component Bose gases
• Optical trapping of ultracold dysprosium atoms: transition probabilities, dynamic dipole polarizabilities and van der Waals $C_6$ coefficients
• Mass scaling and non-adiabatic effects in photoassociation spectroscopy of ultracold strontium atoms
• Two-photon photoassociation spectroscopy of CsYb: ground-state interaction potential and interspecies scattering lengths
• Efficient production of long-lived ultracold Sr${}_2$ molecules
• Dual-species Bose-Einstein condensate of 41K and 87Rb in a hybrid trap
• The RbSr ${}^2{\Sigma }^{+}$ ground state investigated via spectroscopy of hot & ultracold molecules
• Ground and excited state properties of the polar and paramagnetic RbSr molecule: a comparative study
• Time-of-flight expansion of binary Bose-Einstein condensates at finite temperature
• Nonadiabatic Effects in Ultracold Molecules via Anomalous Linear and Quadratic Zeeman Shifts
• Splitting of singly and doubly quantized composite vortices in two-component Bose-Einstein condensates
• Photoassociative production of ultracold heteronuclear YbLi* molecules
• Ground-state multiquantum vortices in rotating two-species superfluids
• Production of ultracold Cs*Yb molecules by photoassociation
• Controlling magnetic Feshbach resonances in polar open-shell molecules with non-resonant light
• Overlapping Bose-Einstein Condensates of ${}^{23}$Na and ${}^{133}$Cs
• Hyperfine structure of the hydroxyl free radical (OH) in electric and magnetic fields
• Production and characterization of a dual species magneto-optical trap of cesium and ytterbium
• Self-bound Doubly-Dipolar Bose-Einstein condensates
• Dynamics of phase separation in two species Bose-Einstein condensates with vortices
• Interspecies thermalization in an ultracold mixture of Cs and Yb in an optical trap
• Quantum hexatic order in two-dimensional dipolar and charged fluids
• Dual Hg-Rb magneto-optical trap
• A versatile dual-species Zeeman slower for caesium and ytterbium
• Magnetic field dependent interactions in an ultracold Li-Yb(${}^3$P${}_2$) mixture
• Ab initio properties of the ground-state polar and paramagnetic europium-alkali-metal-atom and europium-alkaline-earth-metal-atom molecules
• Active stabilization of kilogauss magnetic fields to the ppm level for magnetoassociation on ultranarrow Feshbach resonances
• Harmonically trapped Bose-Bose mixtures: a quantum Monte Carlo study
• Magnetic Feshbach resonances in ultracold collisions between Cs and Yb atoms
• Segregated quantum phases of dipolar bosonic mixtures in two-dimensional optical lattices
• Droplet Arrays in Doubly-Dipolar Bose-Einstein condensates
• Dynamics of correlations in a quasi-2D dipolar Bose gas following a quantum quench
• Immiscible and miscible states in binary condensates in the ring geometry
• Nonequilibrium dynamics of an ultracold dipolar gas
• A compact experimental machine for studying tunable Bose-Bose superfluid mixtures
• Double Degenerate Bose-Fermi Mixture of Strontium and Lithium
• Ultracold rare-earth magnetic atoms with an electric dipole moment
• Phase separation of a Bose-Bose mixture: impact of the trap and particle number imbalance
• Finite temperature spin dynamics of a two-dimensional Bose-Bose atomic mixture
• Ultracold mixtures of metastable He and Rb: scattering lengths from ab initio calculations and thermalization measurements
• Optical Feshbach resonances and ground state molecule production in the RbHg system
• Proposal for the formation of ultracold deeply-bound RbSr dipolar molecules by all-optical methods
• Enhanced quantum spin fluctuations in a binary Bose-Einstein condensate
• Kinetic Model of Trapped Finite Temperature Binary Condensates
• Vortex generation in stirred binary Bose-Einstein condensates
• Relativistic calculations of $C_6$ and $C_8$ coefficients for strontium dimers
• Laser and Fourier transform spectroscopy of ${}^7$Li${}^{88}$Sr
• Moving binary Bose-Einstein condensates in a weak random potential
• Density profiles of two-component Bose-Einstein condensates interacting with a Laguerre-Gaussian Beam
• Fast loading of a cold mixture of Sodium and Potassium atoms from compact and versatile cold atomic beam sources
• Miscibility regimes in a ${}^{23}$Na-${}^{39}$K quantum mixture
• Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
• Dynamics of ultracold dipolar particles in a confined geometry and tilted fields
• Laser and Fourier transform spectroscopy of KCa
• Ultracold Bose Mixtures with Spin-Dependent Fermion-Mediated Interactions
• Tuning of non-paraxial effects of the Laguerre-Gaussian beam interacting with the two-component Bose-Einstein condensates
• An ultracold, optically trapped mixture of {87}Rb and metastable {4}He atoms
• Phase separation and multistability of two-component Bose-Einstein condensate in an optical cavity
• Mass-imbalanced Bose-Einstein condensed mixtures in rotating perturbed trap
• Equilibrium vortex lattices of a binary rotating atomic Bose-Einstein condensate with unequal atomic masses
• A Non-Equilibrium Kinetic Theory for Trapped Binary Condensates
• Evolution of Goldstone mode in binary condensate mixtures
• Production of dual species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb
• Quantum Echo in Two-Component Bose-Einstein Condensates
• Finite temperature ferromagnetic transition in coherently coupled Bose gases
• Purely long-range polar molecules composed of identical lanthanide atoms
• Equilibration of a finite temperature binary Bose gas formed by population transfer
• Bifurcations, stability, and mode evolution in segregated condensate mixtures
• Moving Bose mixtures with dipole-dipole interactions
• Tapered amplifier laser with frequency-shifted feedback
• Quantum Degenerate Mixtures of Cs and Yb
• Miscibility-Immiscibility transition of strongly interacting bosonic mixtures in optical lattices