Tunable dual-species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb

Abstract

We present the production of dual-species Bose-Einstein condensates of ${}^{39}\mathrm{K}$ and ${}^{87}\mathrm{Rb}$. Preparation of both species in the $|F=1,m_F=-1⟩$ state enabled us to exploit a total of three Fesh\-bach resonances which allows for simultaneous Feshbach tuning of the ${}^{39}\mathrm{K}$ intraspecies and the ${}^{39}\mathrm{K}$-${}^{87}\mathrm{Rb}$ interspecies scattering length. Thus dual-species Bose-Einstein condensates were produced by sympathetic cooling of ${}^{39}\mathrm{K}$ with ${}^{87}\mathrm{Rb}$. A dark spontaneous force optical trap was used for ${}^{87}\mathrm{Rb}$, to reduce the losses in ${}^{39}\mathrm{K}$ due to light-assisted collisions in the optical trapping phase, which can be of benefit for other dual-species experiments. The tunability of the scattering length was used to perform precision spectroscopy of the interspecies Feshbach resonance located at $117.56(2)\mathrm{G}$ and to determine the width of the resonance to $1.21(5)\mathrm{G}$ by rethermalization measurements. The transition region from miscible to immiscible dual-species condensates was investigated and the interspecies background scattering length was determined to $28.5a_0$ using an empirical model. This paves the way for dual-species experiments with ${}^{39}\mathrm{K}$ and ${}^{87}\mathrm{Rb}$ BECs ranging from molecular physics to precision metrology.

9 pages, 9 figures

References in corpus (18)

• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Creation of ultracold ${}^{87}$RbCs molecules in the rovibrational ground state
• Double species condensate with tunable interspecies interactions
• Quantum Test of the Universality of Free Fall
• Dual-Species Bose-Einstein Condensate of ${}^{87}$Rb and ${}^{133}$Cs
• Observation of heteronuclear atomic Efimov resonances
• Feshbach resonances in ultracold K(39)
• Tuning of heteronuclear interactions in a quantum-degenerate Fermi-Bose mixture
• Control of the interaction in a Fermi-Bose mixture
• Comparing and contrasting nuclei and cold atomic gases
• UV light-induced atom desorption for large rubidium and potassium magneto-optical traps
• Production of a dual-species Bose-Einstein condensate of Rb and Cs atoms
• Production of quantum degenerate strontium gases: Larger, better, faster, colder
• Accurate near-threshold model for ultracold KRb dimers from interisotope Feshbach spectroscopy
• Coherent heteronuclear spin dynamics in an ultracold spin-1 mixture
• A slow gravity compensated Atom Laser
• Direct evaporative cooling of 41K into a Bose-Einstein condensate
• Kinetic Model of Trapped Finite Temperature Binary Condensates

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