A quantum degenerate Bose-Fermi mixture of ${}^{41}$K and ${}^6$Li

Abstract

We report a new apparatus for the study of two-species quantum degenerate mixture of ${}^{41}$K and ${}^6$Li atoms. We develop and combine several advanced cooling techniques to achieve both large atom number and high phase space density of the two-species atom clouds. Furthermore, we build a high-efficiency two-species magnetic transport system to transfer atom clouds from the 3D magneto-optical-trap chamber to a full glass science chamber of extreme high vacuum environment and good optical access. We perform a forced radio-frequency evaporative cooling for ${}^{41}$K atoms while the ${}^6$Li atoms are sympathetically cooled in an optically-plugged magnetic trap. Finally, we achieve the simultaneous quantum degeneracy for the ${}^{41}$K and ${}^6$Li atoms. The Bose-Einstein condensate of ${}^{41}$K has 1.4$\times$10${}^5$ atoms with a condensate fraction of about 62%, while the degenerate Fermi gas of ${}^6$Li has a total atom number of 5.4$\times$10${}^5$ at 0.25 Fermi temperature.

References in corpus (11)

• Many-Body Physics with Ultracold Gases
• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Bose polarons in the strongly interacting regime
• Ultracold Fermionic Feshbach Molecules of ${}^{23}$Na${}^{40}$K
• Modulation transfer spectroscopy in atomic rubidium
• Majorana spin-flip transitions in a magnetic trap
• Production of large ${}^{41}$K Bose-Einstein condensates using D1 gray molasses
• Direct evaporative cooling of 41K into a Bose-Einstein condensate
• Two-stage magneto-optical trapping and narrow-line cooling of ${}^6$Li atoms to high phase-space density
• All-optical production and transport of a large ${}^6$Li quantum gas in a crossed optical dipole trap
• Narrow-linewidth cooling of ${}^6$Li atoms using the 2S-3P transition

Cited by in corpus (14)

• Landau Effective Interaction between Quasiparticles in a Bose-Einstein Condensate
• Coupled Dipole Oscillations of a Mass-Imbalanced Bose and Fermi Superfluid Mixture
• Feshbach spectroscopy of an ultracold ${}^{41}$K-${}^6$Li mixture and ${}^{41}$K atoms
• Oscillatory-like Expansion of a Fermionic Superfluid
• Mixture of scalar bosons and two-color fermions in one dimension: Superfluid-insulator transitions
• Insulator phases of a mixture of spinor fermions and hard-core bosons
• Observation of the density dependence of the closed-channel fraction of a ${}^6$Li superfluid
• Spin-selective insulators in Bose-Fermi mixtures
• Observation of state-to-state hyperfine-changing collision in a Bose-Fermi mixture of ${}^6$Li and ${}^{41}$K atoms
• Boson-fermion pairing and condensation in two-dimensional Bose-Fermi mixtures
• Mechanical stability of resonant Bose-Fermi mixtures
• Insulator phases of Bose-Fermi mixtures induced by intraspecies next-neighbor interactions
• Development of a 671 nm injection-locked CW Ti:sapphire laser
• High-flux cold lithium-6 and rubidium-87 atoms from compact two-dimensional magneto-optical traps