Zeeman-insensitive cooling of a single atom to its two-dimensional motional ground state in tightly focused optical tweezers

Abstract

We combine near--deterministic preparation of a single atom with Raman sideband cooling, to create a push button mechanism to prepare a single atom in the motional ground state of tightly focused optical tweezers. In the 2D radial plane, we achieve a large ground state fidelity for the entire procedure (loading and cooling) of $\sim$0.73, while the ground state occupancy is $\sim$0.88 for realizations with a single atom present. For 1D axial cooling, we attain a ground state fraction of $\sim$0.52. The combined 3D cooling provides a ground state population of $\sim$0.11. Our Raman sideband cooling variation is indifferent to magnetic field fluctuations, allowing wide--spread unshielded experimental implementations. Our work provides a pathway towards a range of coherent few body experiments.

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Cited by in corpus (12)

• Rydberg atom quantum technologies
• Direct Measurements of Collisional Dynamics in Cold Atom Triads
• Preparation of a Heteronuclear Two-atom System in the 3D Motional Ground State in an Optical Tweezer
• Preparation of one ${}^{87}$Rb and one ${}^{133}$Cs atom in a single optical tweezer
• Large array of Schrödinger cat states facilitated by an optical waveguide
• Nondestructive cooling of an atomic quantum register via state-insensitive Rydberg interactions
• Polarization gradient cooling of single atoms in optical dipole traps
• Preparation of ${}^{87}$Rb and ${}^{133}$Cs in the motional ground state of a single optical tweezer
• Interaction blockade for bosons in an asymmetric double well
• Dynamics of a spin qubit in an optical dipole trap
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• Analysis of Side-band Inequivalence