Direct evaporative cooling of 41K into a Bose-Einstein condensate

Abstract

We have investigated the collisional properties of 41K atoms at ultracold temperature. To show the possibility to use 41K as a coolant, a Bose-Einstein condensate of 41K atoms in the stretched state (F=2, m_F=2) was created for the first time by direct evaporation in a magnetic trap. An upper bound of three body loss coefficient for atoms in the condensate was determined to be 4(2) 10^{-29} cm -6 s-1. A Feshbach resonance in the F=1, m_F=-1 state was observed at 51.42(5) G, which is in good agreement with theoretical prediction.

4 pages, 4 figures

References in corpus (11)

• Many-Body Physics with Ultracold Gases
• Resonant control of elastic collisions in an optically trapped Fermi gas of atoms
• 39-K Bose-Einstein condensate with tunable interactions
• Three-body decay of a rubidium Bose-Einstein condensate
• Fifty-fold improvement in the number of quantum degenerate fermionic atoms
• Feshbach resonances in ultracold K(39)
• Sodium Bose-Einstein Condensates in the F=2 State in a Large-volume Optical Trap
• Quantum-degenerate mixture of fermionic lithium and bosonic rubidium gases
• Potassium ground state scattering parameters and Born-Oppenheimer potentials from molecular spectroscopy
• Intense slow beams of bosonic potassium isotopes
• Heteronuclear quantum gas mixtures

Cited by in corpus (19)

• Feshbach Resonances in Ultracold Gases
• Strongly Interacting Isotopic Bose-Fermi Mixture Immersed in a Fermi Sea
• Tunable dual-species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb
• Sub-Doppler laser cooling of potassium atoms
• Feshbach resonances in potassium Bose-Bose mixtures
• Universal three-body physics in ultracold KRb mixtures
• Direct evaporative cooling of 39K atoms to Bose-Einstein condensation
• Ground-state multiquantum vortices in rotating two-species superfluids
• Production of large ${}^{41}$K Bose-Einstein condensates using D1 gray molasses
• Effects of magnetic dipole-dipole interactions in atomic Bose-Einstein condensates with tunable s-wave interactions
• Feshbach resonances, molecular bound states and prospects of ultracold molecule formation in mixtures of ultracold K and Cs
• Feshbach resonances and weakly bound molecular states of boson-boson and boson-fermion NaK pairs
• Isotopic shift of atom-dimer Efimov resonances in K-Rb mixtures: Critical effect of multichannel Feshbach physics
• A quantum degenerate Bose-Fermi mixture of ${}^{41}$K and ${}^6$Li
• Acetylene-based frequency stabilization of a laser system for potassium laser cooling
• Goldstino spectrum in an ultracold Bose-Fermi mixture with explicitly broken supersymmetry
• Probing Goldstino excitation through the tunneling transport in a Bose-Fermi mixture with explicitly broken supersymmetry
• Multi-frequency telecom fibered laser system for potassium laser cooling
• Control, competition and coexistence of effective magnetic orders by interactions in Bose-Einstein condensates with high-Q cavities