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.

References in corpus (9)

• An atom-by-atom assembler of defect-free arbitrary 2d atomic arrays
• Cooling a single atom in an optical tweezer to its quantum ground state
• Energy distribution and cooling of a single atom in an optical tweezer
• Analysis of dephasing mechanisms in a standing wave dipole trap
• Cooling to the Ground State of Axial Motion for One Atom Strongly Coupled to an Optical Cavity
• High-resolution imaging of ultracold fermions in microscopically tailored optical potentials
• Coherence preservation of a single neutral atom qubit transferred between magic-intensity optical traps
• 3D Projection Sideband Cooling
• In-trap fluorescence detection of atoms in a microscopic dipole trap

Cited by in corpus (4)

• Direct Measurements of Collisional Dynamics in Cold Atom Triads
• Polarization gradient cooling of single atoms in optical dipole traps
• Dynamics of a spin qubit in an optical dipole trap
• Raman sideband cooling of a single atom in an optical dipole trap: Towards theoretical optimum in a three-dimensional regime