Imaging a ${}^6$Li Atom In An Optical Tweezer 2000 Times with $\Lambda$-Enhanced Gray Molasses

Abstract

We have imaged lithium-6 thousands of times in an optical tweezer using $\Lambda$-enhanced gray molasses cooling light. Despite being the lightest alkali, with a recoil temperature of 3.5 $\mu$K, we achieve an imaging survival of 0.99950(2), which sets the new benchmark for low-loss imaging of neutral atoms in optical tweezers. Lithium is loaded directly from a MOT into a tweezer with an enhanced loading rate of 0.7. We cool the atom to 70 $\mu$K and present a new cooling model that accurately predicts steady-state temperature and scattering rate in the tweezer. These results pave the way for ground state preparation of lithium en route to the assembly of the LiCs molecule in its ground state.

References in corpus (27)

• Synthetic three-dimensional atomic structures assembled atom by atom
• High-fidelity control and entanglement of Rydberg atom qubits
• Single-atom imaging of fermions in a quantum-gas microscope
• Site-resolved measurement of the spin-correlation function in the Hubbard model
• Ground state laser cooling using electromagnetically induced transparency
• Experimental demonstration of ground state laser cooling with electromagnetically induced transparency
• Building one molecule from a reservoir of two atoms
• Hong-Ou-Mandel atom interferometry in tunnel-coupled optical tweezers
• Energy distribution and cooling of a single atom in an optical tweezer
• Imaging and addressing of individual fermionic atoms in an optical lattice
• Observation of canted antiferromagnetism with ultracold fermions in an optical lattice
• 2000-times repeated imaging of strontium atoms in clock-magic tweezer arrays
• Rapid production of uniformly-filled arrays of neutral atoms
• $\Lambda$-Enhanced Imaging of Molecules in an Optical Trap
• Λ-enhanced Sub-Doppler Cooling of Lithium Atoms in D1 Gray Molasses
• Universal gate operations on nuclear spin qubits in an optical tweezer array of ${}^{171}$Yb atoms
• Spin-resolved single-atom imaging of ${}^6$Li in free space
• Gray molasses cooling of ${}^{39}$K to a high phase-space density
• Grey-molasses optical-tweezer loading: Controlling collisions for scaling atom-array assembly
• Efficient all-optical production of large ${}^6$Li quantum gases using D${}_1$ gray-molasses cooling
• A Fermi-Hubbard Optical Tweezer Array
• Molecular assembly of ground state cooled single atoms
• Forming a single molecule by magnetoassociation in an optical tweezer
• Observation of Pauli Crystals
• Motional Ground State Cooling Outside the Lamb-Dicke Regime
• Preparation of a Heteronuclear Two-atom System in the 3D Motional Ground State in an Optical Tweezer
• Preparation of ${}^{87}$Rb and ${}^{133}$Cs in the motional ground state of a single optical tweezer

Cited by in corpus (6)

• A tweezer array with 6100 highly coherent atomic qubits
• Continuous operation of large-scale atom arrays in optical lattices
• A high optical access cryogenic system for Rydberg atom arrays with a 3000-second trap lifetime
• A Generalized Theory for Optical Cooling of a Trapped Atom with Spin
• Dual-species Optical tweezer for Rb and K atoms
• Walking with the atoms in a chemical bond : A perspective using quantum phase transition