Production of quantum degenerate strontium gases: Larger, better, faster, colder

Abstract

We report on an improved scheme to generate Bose-Einstein condensates (BECs) and degenerate Fermi gases of strontium. This scheme allows us to create quantum gases with higher atom number, a shorter time of the experimental cycle, or deeper quantum degeneracy than before. We create a BEC of 84-Sr exceeding 10^7 atoms, which is a 30-fold improvement over previously reported experiments. We increase the atom number of 86-Sr BECs to 2.5x10^4 (a fivefold improvement), and refine the generation of attractively interacting 88-Sr BECs. We present a scheme to generate 84-Sr BECs with a cycle time of 2s, which, to the best of our knowledge, is the shortest cycle time of BEC experiments ever reported. We create deeply-degenerate 87-Sr Fermi gases with T/T_F as low as 0.10(1), where the number of populated nuclear spin states can be set to any value between one and ten. Furthermore, we report on a total of five different double-degenerate Bose-Bose and Bose-Fermi mixtures. These studies prepare an excellent starting point for applications of strontium quantum gases anticipated in the near future.

18 pages, 10 figures, title music by Daft Punk

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Cited by in corpus (41)

• Ultracold Fermi Gases with Emergent SU(N) Symmetry
• Continuous Bose-Einstein condensation
• Thermodynamics of a deeply degenerate SU($N$)-symmetric Fermi gas
• Quantum simulation of non-trivial topology
• Sr atom interferometry with the optical clock transition as a gravimeter and a gravity gradiometer
• Static interfacial properties of Bose-Einstein condensate mixtures
• Solving correlation clustering with QAOA and a Rydberg qudit system: a full-stack approach
• Confinement of an alkaline-earth element in a grating magneto-optical trap
• Mass scaling and non-adiabatic effects in photoassociation spectroscopy of ultracold strontium atoms
• Reservoir spectroscopy of 5s5p ${}^3$P${}_2$ - 5s$n$d ${}^3$D${}_{1,2,3}$ transitions in strontium
• Narrow-line imaging of single strontium atoms in shallow optical tweezers
• Multi-loop atomic Sagnac interferometry
• Machine-learning-accelerated Bose-Einstein condensation
• Anisotropic relaxation dynamics in a dipolar Fermi gas driven out of equilibrium
• Fast and dense magneto-optical traps for Strontium
• Observation of Motion Dependent Nonlinear Dispersion with Narrow Linewidth Atoms in an Optical Cavity
• Chandrasekhar-Clogston limit and critical polarization in a Fermi-Bose superfluid mixture
• Critical wetting, first-order wetting and prewetting phase transitions in binary mixtures of Bose-Einstein condensates
• Fast long-distance transport of cold cesium atoms
• Ultracold ${}^{88}{\mathrm{Sr}}_2$ molecules in the absolute ground state
• A strontium quantum-gas microscope
• The ${}^1{\mathrm{S}}_0$-${}^3{\mathrm{P}}_2$ magnetic quadrupole transition in neutral strontium
• Quantum simulation with fully coherent dipole--dipole-interactions mediated by three-dimensional subwavelength atomic arrays
• Flat band induced non-Fermi liquid behavior of multicomponent fermions
• All-Optical Matter-Wave Lens using Time-Averaged Potentials
• Relativistic calculations of $C_6$ and $C_8$ coefficients for strontium dimers
• A high-flux source system for matter-wave interferometry exploiting tunable interactions
• Adiabatic spin-dependent momentum transfer in an SU(N) degenerate Fermi gas
• Sub-second production of a quantum degenerate gas
• Simulating artificial one-dimensional physics with ultra-cold fermionic atoms: three exemplary themes
• Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
• Observation of Bose-enhanced photoassociation products
• Rapid generation of all-optical ${}^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance
• Efficient matter-wave lensing of ultracold atomic mixtures
• State selective cooling of $\mathrm{SU}(N)$ Fermi-gases
• Rapid generation and number-resolved detection of spinor Rubidium Bose-Einstein condensates
• Two-color Ytterbium MOT in a compact dual-chamber setup
• Persistent Current of SU(N) Fermions
• Tellurium Spectrometer for ${}^1{\text{S}}_0-{}^1{\text{P}}_1$ Transitions in Strontium and Other Alkaline-Earth Atoms
• Low-energy scatterings and pseudopotential of polarized quadrupoles
• Ab-initio Quantum Monte Carlo study of ultracold atomic mixtures