Generation of high-purity, low-temperature samples of ${}^{39}$K for applications in metrology

Abstract

We present an all optical technique to prepare a sample of ${}^{39}$K in a magnetically-insensitive state with 95\% purity while maintaining a temperature of 6 $\mu$K. This versatile preparation scheme is particularly well suited to performing matter-wave interferometry with species exhibiting closely-separated hyperfine levels, such as the isotopes of lithium and potassium, and opens new possibilities for metrology with these atoms. We demonstrate the feasibility of such measurements by realizing an atomic gravimeter and a Ramsey-type spectrometer, both of which exhibit a state-of-the-art sensitivity for cold potassium.

arXiv comment6 pages + references, 4 figures, accepted for publication in PRA

References in corpus (39)

• An atomic clock with $10^{-18}$ instability
• Precision Measurement of the Newtonian Gravitational Constant Using Cold Atoms
• New determination of the fine structure constant and test of the quantum electrodynamics
• Multi-axis inertial sensing with long-time point source atom interferometry
• Fermi-Bose quantum degenerate ^40 K - ^87 Rb mixture with attractive interaction
• Quantum Test of the Universality of Free Fall
• New Limits on Coupling of Fundamental Constants to Gravity Using ${}^{87}$Sr Optical Lattice Clocks
• Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach resonances and scattering properties of 6Li and 40K
• Continuous Cold-atom Inertial Sensor with $1{\text{nrad.s}}^{-1}$ Rotation Stability
• Limits to the sensitivity of a low noise compact atomic gravimeter
• Mobile quantum gravity sensor with unprecedented stability
• 39-K Bose-Einstein condensate with tunable interactions
• Dual Matter-Wave Inertial Sensors in Weightlessness
• Comparison of Two Independent Sr Optical Clocks with 1e-17 Stability at 10^3 s
• Characterization and limits of a cold atom Sagnac interferometer
• Atom interferometry with a weakly-interacting Bose Einstein condensate
• Testing sub-gravitational forces on atoms from a miniature, in-vacuum source mass
• Stability comparison of two absolute gravimeters: optical versus atomic interferometers
• 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
• Gray molasses cooling of ${}^{39}$K to a high phase-space density
• Efficient all-optical production of large ${}^6$Li quantum gases using D${}_1$ gray-molasses cooling
• Light-pulse atom interferometry in microgravity
• Sub-Doppler laser cooling of potassium atoms
• Quantum interference-enhanced deep sub-Doppler cooling of 39 K atoms in gray molasses
• All-optical production of a degenerate mixture of 6Li and 40K and creation of heteronuclear molecules
• Correlative methods for dual-species quantum tests of the weak equivalence principle
• Simultaneous sub-Doppler laser cooling of fermionic ${}^6$Li and ${}^{40}$K on the D${}_1$ line: Theory and Experiment
• Metrology with Atom Interferometry: Inertial Sensors from Laboratory to Field Applications
• Efficient Production of Large 39K Bose-Einstein Condensates
• Active Control of Laser Wavefronts in Atom Interferometers
• All optical cooling of ${}^{39}$K to Bose Einstein condensation
• Sub-Doppler Laser Cooling of Fermionic K-40 Atoms
• Atom interferometric techniques for measuring uniform magnetic field gradients and gravitational acceleration
• Degenerate Raman sideband cooling of 39K
• Recoil-sensitive lithium interferometer without a subrecoil sample
• Composite pulses in Hyper-Ramsey spectroscopy for the next generation of atomic clocks
• Atom interferometry and the Einstein equivalence principle
• Studies of general relativity with quantum sensors

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• Quantum simulation and computing with Rydberg-interacting qubits
• Realization of a Rydberg-dressed Ramsey interferometer and electrometer
• Survey of hyperfine structure measurements in alkali atoms
• Quantum test of the Universality of Free Fall using rubidium and potassium
• Precision measurement of the ionization energy and quantum defects of 39K I
• Testing the Universality of Free Fall using correlated ${}^{39}$K -- ${}^{87}$Rb interferometers
• Acetylene-based frequency stabilization of a laser system for potassium laser cooling
• Rapid generation of all-optical ${}^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance
• Quantum Physics in Space
• Experimental study of magnetically insensitive transitions in ultracold Fermi gas of ${}^{40}$K