Sympathetic cooling and collisional properties of a Rb-Cs mixture

Abstract

We report on measurements of the collisional properties of a mixture of ${}^{133}$Cs and ${}^{87}$Rb atoms in a magnetic trap at $\mu \mathrm{K}$ temperatures. By selectively evaporating the Rb atoms using a radio-frequency field, we achieved sympathetic cooling of Cs down to a few $\mu \mathrm{K}$. The inter-species collisional cross-section was determined through rethermalization measurements, leading to an estimate of $a_s=595a_0$ for the s-wave scattering length for Rb in the $|F=2,m_F=2>$ and Cs in the $|F=4,m_F=4>$ magnetic states. We briefly speculate on the prospects for reaching Bose-Einstein condensation of Cs inside a magnetic trap through sympathetic cooling.

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Cited by in corpus (19)

• Dynamics of single neutral impurity atoms immersed in an ultracold gas
• Species-specific optical lattices
• Observation of interspecies Feshbach resonances in an ultracold Rb-Cs mixture
• Rapid sympathetic cooling to Fermi degeneracy on a chip
• Dynamics, dephasing and clustering of impurity atoms in Bose-Einstein condensates
• A high phase-space density mixture of ${}^{87}$Rb and ${}^{133}$Cs: towards ultracold heteronuclear molecules
• Thermalization in mixtures of ultracold gases
• Production and characterization of a dual species magneto-optical trap of cesium and ytterbium
• Preparation of one ${}^{87}$Rb and one ${}^{133}$Cs atom in a single optical tweezer
• Bose-Einstein condensation of 87Rb in a levitated crossed dipole trap
• Magnetic trapping of a cold Rb-Cs atomic mixture
• Ultracold Thermalization of ${}^7$Li and ${}^{87}$Rb
• Single Cs Atoms as Collisional Probes in a large Rb Magneto-Optical Trap
• Two types of phase diagrams for two-species Bose-Einstein condensates
• Interisotope effects in optimal dual-isotope loading into a shallow optical trap
• Using modified Gaussian distribution to study the physical properties of one and two-component ultracold atoms
• Analytical solutions of the coupled Gross-Pitaevskii equations for the three-species Bose-Einstein condensates
• Evaluation of the particle numbers via the two root mean square radii in a 2-species Bose-Einstein condensate
• Method of numerical simulation of interacting quantum gas kinetics on finite momentum lattice