Gray molasses cooling of ${}^{39}$K to a high phase-space density

Abstract

We present new techniques in cooling 39K atoms using laser light close to the D1 transition. First, a new compressed-MOT configuration is taking advantage of gray molasses type cooling induced by blue-detuned D1 light. It yields an optimized density of atoms. Then, we use pure D1 gray molasses to further cool the atoms to an ultra-low temperature of 6\,$\mu$K. The resulting phase-space density is $2\times 10^{-4}$ and will ease future experiments with ultracold potassium. As an example, we use it to directly load up to $3\times 10^7$ atoms in a far detuned optical trap, a result that opens the way to the all-optical production of potassium degenerate gases.

6 pages, 5 figures

References in corpus (10)

• Many-Body Physics with Ultracold Gases
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• 39-K Bose-Einstein condensate with tunable interactions
• Interference-filter-stabilized external-cavity diode lasers
• Feshbach resonances in ultracold K(39)
• Λ-enhanced Sub-Doppler Cooling of Lithium Atoms in D1 Gray Molasses
• Sub-Doppler laser cooling of fermionic 40K atoms in three-dimensional gray optical molasses
• Magnetic field control of elastic scattering in a cold gas of fermionic lithium atoms
• Quantum interference-enhanced deep sub-Doppler cooling of 39 K atoms in gray molasses
• Direct evaporative cooling of 39K atoms to Bose-Einstein condensation

Cited by in corpus (56)

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• Efficient all-optical production of large ${}^6$Li quantum gases using D${}_1$ gray-molasses cooling
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• Correlative methods for dual-species quantum tests of the weak equivalence principle
• $\Lambda$-enhanced grey molasses on the $D_2$ transition of Rubidium-87 atoms
• Realization of a Rydberg-dressed Ramsey interferometer and electrometer
• Simultaneous sub-Doppler laser cooling of fermionic ${}^6$Li and ${}^{40}$K on the D${}_1$ line: Theory and Experiment
• Sub-Doppler cooling of sodium atoms in gray molasses
• A new quantum gas apparatus for ultracold mixtures of K and Cs and KCs ground-state molecules
• A steady-state magneto-optical trap with 100 fold improved phase-space density
• All optical cooling of ${}^{39}$K to Bose Einstein condensation
• Realistic Shortcuts to Adiabaticity in Optical Transfer
• Observation of Weak Collapse in a Bose-Einstein Condensate
• Absolute absorption on the potassium D lines:theory and experiment
• Production of large ${}^{41}$K Bose-Einstein condensates using D1 gray molasses
• Testing the Universality of Free Fall using correlated ${}^{39}$K -- ${}^{87}$Rb interferometers
• High Sensitivity RF Spectroscopy of a Strongly-Interacting Fermi Gas
• Two-stage magneto-optical trapping and narrow-line cooling of ${}^6$Li atoms to high phase-space density
• Sub-Doppler laser cooling of 40K with Raman gray molasses on the D2 line
• All-optical production and transport of a large ${}^6$Li quantum gas in a crossed optical dipole trap
• Degenerate Raman sideband cooling of 39K
• Towards improved loading, cooling, and trapping of molecules in magneto-optical traps
• Raman Gray Molasses Cooling of Cesium Atoms on the D2 Line
• Generation of high-purity, low-temperature samples of ${}^{39}$K for applications in metrology
• A quantum degenerate Bose-Fermi mixture of ${}^{41}$K and ${}^6$Li
• A compact experimental machine for studying tunable Bose-Bose superfluid mixtures
• Atom-Number Enhancement by Shielding Atoms from Losses in Strontium Magneto-Optical Traps
• Production of large Bose-Einstein condensates in a magnetic-shield-compatible hybrid trap
• Narrow-line cooling of ${}^{87}$Rb using 5S${}_{1/2}\to$ 6P${}_{3/2}$ open transition at 420 nm
• Acetylene-based frequency stabilization of a laser system for potassium laser cooling
• Narrow-linewidth cooling of ${}^6$Li atoms using the 2S-3P transition
• Sub-Doppler laser cooling of 23Na in gray molasses on the D2 line
• Imaging a ${}^6$Li Atom In An Optical Tweezer 2000 Times with $\Lambda$-Enhanced Gray Molasses
• Quantitative analysis of losses close to a d-wave open-channel Feshbach resonance in Potassium 39
• A high-flux source system for matter-wave interferometry exploiting tunable interactions
• Comparison of an efficient implementation of gray molasses to narrow-line cooling for the all-optical production of a lithium quantum gas
• Fast and High-Yield Loading of a D${}_2$ MOT of Potassium from a Cryogenic Buffer Gas Beam
• Rapid production of large ${}^7$Li Bose-Einstein condensates using $D_1$ gray molasses
• $\Lambda$-enhanced gray molasses in a tetrahedral laser beam geometry
• Rapid generation of all-optical ${}^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance
• Matter-wave collimation to picokelvin energies with scattering length and potential shape control
• Bidirectional, Analog Current Source Benchmarked with Gray Molasses-Assisted Stray Magnetic Field Compensation
• Degenerate Raman sideband cooling of 40K atoms
• Sub-Doppler laser cooling of ${}^{39}$K via the 4S$\to$5P transition
• Cooling All External Degrees of Freedom of Optically Trapped Chromium Atoms Using Gray Molasses
• A magneto-optical trap of silver and potassium atoms
• Production of dual species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb
• Multi-frequency telecom fibered laser system for potassium laser cooling
• Spatial adiabatic passage of ultracold atoms in optical tweezers
• Bose-Einstein condensation by polarization gradient laser cooling
• Effect of AC-Stark shift in optical dipole trap on absorption imaging of trapped atoms
• Tutorial: Current controllers for optimizing laser cooling on cold atom experiments
• Sub-Doppler laser cooling and magnetic trapping of natural-abundance fermionic potassium
• $\Lambda$-Enhanced Gray Molasses Cooling of ${}^{85}$Rb Atoms in Tweezers Using the D${}_2$ Line