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.

arXiv comment18 pages, 10 figures, title music by Daft Punk

References in corpus (86)

• Theory of Bose-Einstein condensation in trapped gases
• Feshbach Resonances in Ultracold Gases
• Artificial gauge potentials for neutral atoms
• Theory of ultracold Fermi gases
• A toolbox for lattice spin models with polar molecules
• The dynamics of component separation in a binary mixture of Bose-Einstein condensates
• A quasi-pure Bose-Einstein condensate immersed in a Fermi sea
• Dynamics of collapsing and exploding Bose-Einstein condensates
• Coherent transport of neutral atoms in spin-dependent optical lattice potentials
• Two-species mixture of quantum degenerate Bose and Fermi gases
• A two atomic species superfluid
• Fermi-Bose quantum degenerate ^40 K - ^87 Rb mixture with attractive interaction
• Quantum dynamics of impurities in a 1D Bose gas
• An SU(N) Mott insulator of an atomic Fermi gas realized by large-spin Pomeranchuk cooling
• Quantum simulation of an extra dimension
• Exact SO(5) Symmetry in spin 3/2 fermionic system
• Degenerate Fermi Gases of Ytterbium
• Gauge fields for ultracold atoms in optical superlattices
• Realization of SU(2)*SU(6) Fermi System
• Ultracold Gases of Ytterbium: Ferromagnetism and Mott States in an SU(6) Fermi System
• Three-body recombination of ultra-cold atoms to a weakly bound $s$ level
• Quantum computing with alkaline earth atoms
• Precision Test of Mass Ratio Variations with Lattice-Confined Ultracold Molecules
• Long-lived Bloch oscillations with bosonic Sr atoms and application to gravity measurement at micrometer scale
• Colloquium: Physics of optical lattice clocks
• Control of Interaction-Induced Dephasing of Bloch Oscillations
• Mott Insulators of Ultracold Fermionic Alkaline Earth Atoms: Underconstrained Magnetism and Chiral Spin Liquid
• Degenerate Bose-Bose mixture in a three-dimensional optical lattice
• Three-body recombination in Bose gases with large scattering length
• Bose-Einstein Condensation of Strontium
• Two-color photoassociation spectroscopy of ytterbium atoms and the precise determinations of s-wave scattering lengths
• Degenerate Fermi Gas of ${}^{87}$Sr
• Optical Flux Lattices for Ultracold Atomic Gases
• Hidden symmetry and quantum phases in spin-3/2 cold atomic systems
• Quantum degenerate mixtures of alkali and alkaline-earth-like atoms
• Entropy exchange in a mixture of ultracold atoms
• Alkaline-Earth-Metal Atoms as Few-Qubit Quantum Registers
• Bose-Einstein condensation of alkaline earth atoms: ${}^{40}${Ca}
• Pauli Blocking of Collisions in a Quantum Degenerate Atomic Fermi Gas
• Critical number of atoms for attractive Bose-Einstein condensates with cylindrically symmetrical traps
• Systematic study of Optical Feshbach Resonances in an ideal gas
• All-Optical Formation of Quantum Degenerate Mixtures
• Quantum degenerate Bose-Fermi mixture of chemically different atomic species with widely tunable interactions
• Bose-Einstein Condensation of an Ytterbium Isotope
• Topology of the ground state of two interacting Bose-Einstein condensates
• Double-degenerate Bose-Fermi mixture of strontium
• Quantum logic via the exchange blockade in ultracold collisions
• Ultracold RbSr molecules can be formed by magnetoassociation
• Creation of ultracold Sr2 molecules in the electronic ground state
• All-Optical Production of a Lithium Quantum Gas Using Narrow-Line Laser Cooling
• Optical tuning of the scattering length of cold alkaline earth atoms
• Probing the Kondo Lattice Model with Alkaline Earth Atoms
• Strongly Interacting Isotopic Bose-Fermi Mixture Immersed in a Fermi Sea
• Two-photon photoassociative spectroscopy of ultracold 88-Sr
• Production of a dual-species Bose-Einstein condensate of Rb and Cs atoms
• The ground state of the polar alkali-Strontium molecules: potential energy curve and permanent dipole moment
• A Degenerate Bose-Fermi Mixture of Metastable Atoms
• SU(N) magnetism in chains of ultracold alkaline-earth-metal atoms: Mott transitions and quantum correlations
• Dissipation-induced d-Wave Pairing of Fermionic Atoms in an Optical Lattice
• Quantum Degenerate Mixture of Ytterbium and Lithium Atoms
• Optical Production of Stable Ultracold ${}^{88}$Sr${}_2$ Molecules
• Narrow Line Cooling: Finite Photon Recoil Dynamics
• Z_2 Topological Insulators in Ultracold Atomic Gases
• Lifetime measurement of the ^3P_2 metastable state of strontium atoms
• State-dependent, addressable subwavelength lattices with cold atoms
• Bose-Einstein condensate in gases of rare atomic species
• Detection and manipulation of nuclear spin states in fermionic strontium
• The ^1S+^1S asymptote of Sr_2 studied by Fourier-transform spectroscopy
• Designing spin-1 lattice models using polar molecules
• Bose-Einstein Condensation of ${}^{88}$Sr Through Sympathetic Cooling with ${}^{87}$Sr
• Two-electron excitation of an interacting cold Rydberg gas
• High temperature thermodynamics of fermionic alkaline earth atoms in optical lattices
• Cooling and trapping of ultra-cold strontium isotopic mixtures
• Adiabatic loading of one-dimensional SU(N) alkaline earth fermions in optical lattices
• Prospects for application of ultracold Sr${}_2$ molecules in precision measurements
• Heavy fermions in an optical lattice
• Bose-Einstein condensation of 86Sr
• Laser cooling and trapping of atomic strontium for ultracold atom physics, high-precision spectroscopy and quantum sensors
• Quantum magnetism of ultra-cold fermion systems with the symplectic symmetry
• Cooling of Sr to high phase-space density by laser and sympathetic cooling in isotopic mixtures
• Liquids in multi-orbital SU(N) Magnets with Ultracold Alkaline Earth Atoms
• Interaction-driven effects on two-component Bose-Einstein condensates
• Entanglement of group-II-like atoms with fast measurement for quantum information processing
• State-dependent lattices for quantum computing with alkaline-earth-metal atoms
• Synthetic magnetic fluxes on the honeycomb lattice
• Scattering lengths of calcium and barium isotopes

Cited by in corpus (66)

• A Fermi-degenerate three-dimensional optical lattice clock
• Ultracold Fermi Gases with Emergent SU(N) Symmetry
• Laser cooling to quantum degeneracy
• An ytterbium quantum gas microscope with narrow-line laser cooling
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• Tunable dual-species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb
• Continuous Bose-Einstein condensation
• Dimerized Solids and Resonating Plaquette Order in SU(N)-Dirac Fermions
• Large-momentum-transfer Bragg interferometer with strontium atoms
• Thermodynamics of a deeply degenerate SU($N$)-symmetric Fermi gas
• Rapid Cooling to Quantum Degeneracy in Dynamically Shaped Atom Traps
• Quantum simulation of non-trivial topology
• Sr atom interferometry with the optical clock transition as a gravimeter and a gravity gradiometer
• Atomic source selection in space-borne gravitational wave detection
• Static interfacial properties of Bose-Einstein condensate mixtures
• A high flux source of cold strontium atoms
• 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
• Competing states in the SU(3) Heisenberg model on the honeycomb lattice: Plaquette valence-bond crystal versus dimerized color-ordered state
• Reservoir spectroscopy of 5s5p ${}^3$P${}_2$ - 5s$n$d ${}^3$D${}_{1,2,3}$ transitions in strontium
• Efficient production of long-lived ultracold Sr${}_2$ molecules
• Dual-species Bose-Einstein condensate of 41K and 87Rb in a hybrid trap
• Narrow-line imaging of single strontium atoms in shallow optical tweezers
• Multi-loop atomic Sagnac interferometry
• Ground and excited state properties of the polar and paramagnetic RbSr molecule: a comparative study
• 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
• Splitting of singly and doubly quantized composite vortices in two-component Bose-Einstein condensates
• Observation of Motion Dependent Nonlinear Dispersion with Narrow Linewidth Atoms in an Optical Cavity
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• Theory of SU(N) Fermi liquid
• Interaction effects with varying $N$ in SU($N$) symmetric fermion lattice systems
• Fast long-distance transport of cold cesium atoms
• Ultracold ${}^{88}{\mathrm{Sr}}_2$ molecules in the absolute ground state
• Spectroscopy of ${}^{87}\text{Sr}$ triplet Rydberg states
• A strontium quantum-gas microscope
• Quantum simulation with fully coherent dipole--dipole-interactions mediated by three-dimensional subwavelength atomic arrays
• The ${}^1{\mathrm{S}}_0$-${}^3{\mathrm{P}}_2$ magnetic quadrupole transition in neutral strontium
• Quantum treatment of two-stage sub-Doppler laser cooling of magnesium atoms
• All-Optical Matter-Wave Lens using Time-Averaged Potentials
• Flat band induced non-Fermi liquid behavior of multicomponent fermions
• Mott insulators of ultracold fermionic alkaline earth atoms in three dimensions
• Relativistic calculations of $C_6$ and $C_8$ coefficients for strontium dimers
• Sub-second production of a quantum degenerate gas
• Adiabatic spin-dependent momentum transfer in an SU(N) degenerate Fermi gas
• A high-flux source system for matter-wave interferometry exploiting tunable interactions
• The frequency of the ultranarrow ${}^1{\text{S}}_0-{}^3{\text{P}}_2$ transition in ${}^{87}\text{Sr}$
• 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
• Enhanced Magnetic Trap Loading for Atomic Strontium
• Observation of Bose-enhanced photoassociation products
• Quantum phases of quadrupolar Fermi gases in coupled one-dimensional systems
• Rapid generation of all-optical ${}^{39}$K Bose-Einstein condensates using a low-field Feshbach resonance
• Efficient matter-wave lensing of ultracold atomic mixtures
• Controlling ultracold $p$-wave collisions with non-resonant light: Predictions of an asymptotic model for the generalized scattering volume
• State selective cooling of $\mathrm{SU}(N)$ Fermi-gases
• Two-color Ytterbium MOT in a compact dual-chamber setup
• Rapid generation and number-resolved detection of spinor Rubidium Bose-Einstein condensates
• Persistent Current of SU(N) Fermions
• Nonlinear Zeeman effect in photoassociation spectra of ${}^{40}$Ca near the ${}^3$P${}_1$+${}^1$S${}_0$ asymptote
• Tellurium Spectrometer for ${}^1{\text{S}}_0-{}^1{\text{P}}_1$ Transitions in Strontium and Other Alkaline-Earth Atoms
• Ab-initio Quantum Monte Carlo study of ultracold atomic mixtures
• Low-energy scatterings and pseudopotential of polarized quadrupoles