Efficient Production of Large 39K Bose-Einstein Condensates

Abstract

We describe an experimental setup and the cooling procedure for producing 39K Bose-Einstein condensates of over 4x10^5 atoms. Condensation is achieved via a combination of sympathetic cooling with 87Rb in a quadrupole-Ioffe-configuration (QUIC) magnetic trap, and direct evaporation in a large volume crossed optical dipole trap, where we exploit the broad Feshbach resonance at 402 G to tune the 39K interactions from weak and attractive to strong and repulsive. In the same apparatus we create quasi-pure 87Rb condensates of over 8x10^5 atoms.

7 pages, 5 figures; figure font compatibility improved

References in corpus (16)

• Many-Body Physics with Ultracold Gases
• Theory of Bose-Einstein condensation in trapped gases
• Feshbach Resonances in Ultracold Gases
• Anderson localization of a non-interacting Bose-Einstein condensate
• Atom Interferometers
• Inter-isotope determination of ultracold rubidium interactions from three high-precision experiments
• Observation of an Efimov spectrum in an atomic system
• Direct observation of growth and collapse of a Bose-Einstein condensate with attractive interactions
• 39-K Bose-Einstein condensate with tunable interactions
• Rapid production of ${}^{87}$Rb BECs in a combined magnetic and optical potential
• Atom interferometry with a weakly-interacting Bose Einstein condensate
• Feshbach resonances in ultracold K(39)
• Feshbach spectroscopy of a K-Rb atomic mixture
• The critical temperature of a trapped, weakly interacting Bose gas
• Suppression of Density Fluctuations in a Quantum Degenerate Fermi Gas
• Understanding the production of dual BEC with sympathetic cooling

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• Connecting Berezinskii-Kosterlitz-Thouless and BEC phase transitions by tuning interactions in a trapped gas
• Can a Bose gas be saturated?
• Quantum Gas Mixtures and Dual-Species Atom Interferometry in Space
• Direct evaporative cooling of 39K atoms to Bose-Einstein condensation
• Dual-species Bose-Einstein condensate of 41K and 87Rb in a hybrid trap
• A Distributed GUI-based Computer Control System for Atomic Physics Experiments
• Condensed Fraction of an Atomic Bose Gas Induced by Critical Correlations
• All optical cooling of ${}^{39}$K to Bose Einstein condensation
• Observation of Weak Collapse in a Bose-Einstein Condensate
• Analog cosmological reheating in an ultracold Bose gas
• Quench dynamics of an ultracold two-dimensional Bose gas
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• Generation of high-purity, low-temperature samples of ${}^{39}$K for applications in metrology
• Bose-Einstein condensate fluctuations versus an interparticle interaction
• A superheated Bose-condensed gas
• Elliptic flow in a strongly-interacting normal Bose gas
• Semiclassical Hartree-Fock theory of a rotating Bose-Einstein condensation
• Quantum supremacy of the many-body fluctuations in the occupations of the excited particle states in a Bose-Einstein-condensed gas
• Rapid generation of all-optical ${}^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance
• Production of dual species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb