Single-site-resolved imaging of ultracold atoms in a triangular optical lattice

Abstract

We demonstrate single-site-resolved fluorescence imaging of ultracold ${}^{87}\mathrm{Rb}$ atoms in a triangular optical lattice by employing Raman sideband cooling. Combining a Raman transition at the D1 line and a photon scattering through an optical pumping of the D2 line, we obtain images with low background noise. The Bayesian optimisation of 11 experimental parameters for fluorescence imaging with Raman sideband cooling enables us to achieve single-atom detection with a high fidelity of $(96.3\pm 1.3)$%. Single-atom and single-site resolved detection in a triangular optical lattice paves the way for the direct observation of spin correlations or entanglement in geometrically frustrated systems.

arXiv comment12 pages, 5 figures

References in corpus (26)

• Quantum Spin Liquids
• A quantum gas microscope - detecting single atoms in a Hubbard regime optical lattice
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Controlling Spin Exchange Interactions of Ultracold Atoms in Optical Lattices
• Measuring entanglement entropy through the interference of quantum many-body twins
• Stable 85Rb Bose-Einstein Condensates with Widely Tunable Interactions
• Experimental realization of a long-range antiferromagnet in the Hubbard model with ultracold atoms
• Quantum simulation of frustrated magnetism in triangular optical lattices
• Quantum dynamics of a single, mobile spin impurity
• Counterflow Superfluidity of Two-Species Ultracold Atoms in a Commensurate Optical Lattice
• Microscopic observation of magnon bound states and their dynamics
• A Quantum Gas Microscope for Fermionic Atoms
• Site-resolved Imaging of Fermionic Lithium-6 in an Optical Lattice
• Observation of Correlated Particle-Hole Pairs and String Order in Low-Dimensional Mott Insulators
• Transport of Bose-Einstein Condensates with Optical Tweezers
• Microscopic Observation of Pauli Blocking in Degenerate Fermionic Lattice Gases
• Revealing Hidden Antiferromagnetic Correlations in Doped Hubbard Chains via String Correlators
• Fast machine-learning online optimization of ultra-cold-atom experiments
• Frustrated quantum antiferromagnetism with ultracold bosons in a triangular lattice
• An ytterbium quantum gas microscope with narrow-line laser cooling
• Quantum state engineering of a Hubbard system with ultracold fermions
• Spatially Resolved Detection of a Spin-Entanglement Wave in a Bose-Hubbard Chain
• Machine Learning for Achieving Bose-Einstein Condensation of Thulium Atoms
• Applying machine learning optimization methods to the production of a quantum gas
• Approaching the adiabatic timescale with machine-learning
• Frustrated Quantum Magnetism with Bose Gases in Triangular Optical Lattices at Negative Absolute Temperatures

Cited by in corpus (25)

• Quantum gas microscopy for single atom and spin detection
• Exploration of doped quantum magnets with ultracold atoms
• Frustration- and doping-induced magnetism in a Fermi-Hubbard simulator
• Site-resolved imaging of ultracold fermions in a triangular-lattice quantum gas microscope
• Observation of Nagaoka Polarons in a Fermi-Hubbard Quantum Simulator
• Directly imaging spin polarons in a kinetically frustrated Hubbard system
• Quantum gas magnifier for sub-lattice-resolved imaging of three-dimensional quantum systems
• An unsupervised deep learning algorithm for single-site reconstruction in quantum gas microscopes
• Observation of brane parity order in programmable optical lattices
• Holes and magnetic polarons in a triangular lattice antiferromagnet
• Neural network approach to quasiparticle dispersions in doped antiferromagnets
• Site-Resolved Imaging of Bosonic Mott Insulator of ${}^7$Li atoms
• A comparative study of deconvolution techniques for quantum-gas microscope images
• Three-dimensional imaging of single atoms in an optical lattice via helical point-spread-function engineering
• Observation of Chiral-Mode Domains in a Frustrated XY Model on Optical Triangular Lattices
• Enhanced dark-state sideband cooling in trapped atoms via photon-mediated dipole-dipole interactions
• Kinetic magnetism in the crossover between the square and triangular lattice Fermi-Hubbard models
• Commensurate and incommensurate 1D interacting quantum systems
• Probing a quantum spin liquid with equilibrium and nonequilibrium hole dynamics
• Spin-charge bound states and emerging fermions in a quantum spin liquid
• Emerging (2+1)D massive graviton in graphene-like systems
• Fast, accurate, and predictive method for atom detection in site-resolved images of microtrap arrays
• Microscopic theory of the Hubbard interaction in low-dimensional optical lattices
• Localized fermions on the triangular lattice with Ising-like interactions
• Site-resolved observables in the doped spin-imbalanced triangular Hubbard model