High-fidelity detection of large-scale atom arrays in an optical lattice

Abstract

Recent advances in quantum simulation based on neutral atoms have largely benefited from high-resolution, single-atom sensitive imaging techniques. A variety of approaches have been developed to achieve such local detection of atoms in optical lattices or optical tweezers. For alkaline-earth and alkaline-earth-like atoms, the presence of narrow optical transitions opens up the possibility of performing novel types of Sisyphus cooling, where the cooling mechanism originates from the capability to spatially resolve the differential optical level shifts in the trap potential. Up to now, it has been an open question whether high-fidelity imaging could be achieved in a "repulsive Sisyphus" configuration, where the trap depth of the ground state exceeds that of the excited state involved in cooling. Here, we demonstrate high-fidelity ($99.971(1)\%$) and high-survival ($99.80(5)\%$) imaging of strontium atoms using repulsive Sisyphus cooling. We use an optical lattice as a pinning potential for atoms in a large-scale tweezer array with up to $399$ tweezers and show repeated, high-fidelity lattice-tweezer-lattice transfers. We furthermore demonstrate loading the lattice with approximately 10000 atoms directly from the MOT and scalable imaging over $>10000$ lattice sites with a combined survival probability and classification fidelity better than $99.2\%$. Our lattice thus serves as a locally addressable and sortable reservoir for continuous refilling of optical tweezer arrays in the future.

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Cited by in corpus (38)

• Logical quantum processor based on reconfigurable atom arrays
• A tweezer array with 6100 highly coherent atomic qubits
• A dual-species Rydberg array
• Continuous operation of large-scale atom arrays in optical lattices
• Ultra-precise holographic optical tweezers array
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• Bosonic Quantum Error Correction with Neutral Atoms in Optical Dipole Traps
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• Efimov Effect in Long-range Quantum Spin Chains
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• Tailoring interaction ranges in atom arrays
• Single Sr Atoms in Optical Tweezer Arrays for Quantum Simulation
• Differential polarizability at 1064 nm of the strontium intercombination transition
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• Astigmatism-free 3D Optical Tweezer Control for Rapid Atom Rearrangement
• Universal Relations in Long-range Quantum Spin Chains
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