A strontium quantum-gas microscope

Abstract

The development of quantum-gas microscopes has brought novel ways of probing quantum degenerate many-body systems at the single-atom level. Until now, most of these setups have focused on alkali atoms. Expanding quantum-gas microscopy to alkaline-earth elements will provide new tools, such as SU(N)-symmetric fermionic isotopes or ultranarrow optical transitions, to the field of quantum simulation. Here, we demonstrate the site-resolved imaging of a ${}^{84}$Sr bosonic quantum gas in a Hubbard-regime optical lattice. The quantum gas is confined by a two-dimensional in-plane lattice and a light-sheet potential, which operate at the strontium clock-magic wavelength of 813.4 nm. We realize fluorescence imaging using the broad 461 nm transition, which provides high spatial resolution. Simultaneously, we perform attractive Sisyphus cooling with the narrow 689 nm intercombination line. We reconstruct the atomic occupation from the fluorescence images, obtaining imaging fidelities above 94%. Finally, we realize a ${}^{84}$Sr superfluid in the Bose-Hubbard regime. We observe its interference pattern upon expansion, a probe of phase coherence, with single-atom resolution. Our strontium quantum-gas microscope provides a new platform to study dissipative Hubbard models, quantum optics in atomic arrays, and SU(N) fermions at the microscopic level.

11 pages, 6 figures

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Cited by in corpus (15)

• In-situ Imaging of a Single-Atom Wave Packet in Continuous Space
• Persistent currents in ultracold gases
• Many-body Physics of Ultracold Alkaline-Earth atoms with SU($N$)-symmetric interactions
• Dynamically emergent correlations in bosons via quantum resetting
• Realization of a fast triple-magic all-optical qutrit in strontium-88
• Single-beam grating-chip 3D and 1D optical lattices
• Microsecond-scale high-survival and number-resolved detection of ytterbium atom arrays
• Dynamically generated correlations in a trapped bosonic gas via frequency quenches
• Fast, accurate, and predictive method for atom detection in site-resolved images of microtrap arrays
• Collectively enhanced ground-state cooling in subwavelength atomic arrays
• Unit-density SU(3) Fermi-Hubbard Model with Spin Flavor Imbalance
• Magic wavelength at 477 nm for the strontium clock transition
• Differential polarizability at 1064 nm of the strontium intercombination transition
• Magnetic correlations in the $SU(3)$ triangular-lattice $t$-$J$ model at finite doping
• Entanglement-enhanced correlation propagation in the one-dimensional SU($N$) Fermi-Hubbard model