Motional ground-state cooling of single atoms in state-dependent optical tweezers

Abstract

Laser cooling of single atoms in optical tweezers is a prerequisite for neutral atom quantum computing and simulation. Resolved sideband cooling comprises a well-established method for efficient motional ground-state preparation, but typically requires careful cancellation of light shifts in so-called magic traps. Here, we study a novel laser cooling scheme which overcomes such constraints, and applies when the ground-state of a narrow cooling transition is trapped stronger than the excited state. We demonstrate our scheme, which exploits sequential addressing of red sideband transitions via frequency chirping of the cooling light, at the example of ${}^{88}$Sr atoms, and report ground-state populations compatible with recent experiments in magic tweezers. The scheme also induces light-assisted collisions, which are key to the assembly of large atom arrays. Our work enriches the toolbox for tweezer-based quantum technology, also enabling applications for tweezer-trapped molecules and ions that are incompatible with resolved sideband cooling conditions.

11 pages, 6 figures

References in corpus (17)

• QuTiP 2: A Python framework for the dynamics of open quantum systems
• Many-Body Physics with Individually-Controlled Rydberg Atoms
• An atom-by-atom assembler of defect-free arbitrary 2d atomic arrays
• Demonstration of multi-qubit entanglement and algorithms on a programmable neutral atom quantum computer
• 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
• Development of a configuration-interaction + all-order method for atomic calculations
• 2000-times repeated imaging of strontium atoms in clock-magic tweezer arrays
• Assembly and coherent control of a register of nuclear spin qubits
• Assembly of a rovibrational ground state molecule in an optical tweezer
• Ultrafast energy exchange between two single Rydberg atoms on the nanosecond timescale
• Narrow Line Photoassociation in an Optical Lattice
• Tweezer-programmable 2D quantum walks in a Hubbard-regime lattice
• A Fermi-Hubbard Optical Tweezer Array
• Direct laser cooling to Bose-Einstein condensation in a dipole trap
• Narrow-line imaging of single strontium atoms in shallow optical tweezers
• Prospects for single photon sideband cooling of optically trapped neutral atoms

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• Erasure-cooling, control, and hyper-entanglement of motion in optical tweezers
• Optimal control transport of neutral atoms in optical tweezers at finite temperature
• Avalanche terahertz photon detection in a Rydberg tweezer array
• Optimal control in phase space applied to minimal-time transfer of thermal atoms in optical traps
• Finite-temperature Rydberg arrays: quantum phases and entanglement characterization
• Quadrupole coupling of circular Rydberg qubits to inner shell excitations
• Narrowline cooling of dysprosium atoms in an optical tweezer array
• Two-photon cooling of calcium atoms
• Isotope-agnostic motional ground-state cooling of neutral Yb atoms
• Single Sr Atoms in Optical Tweezer Arrays for Quantum Simulation
• Differential polarizability at 1064 nm of the strontium intercombination transition
• A Robust Strontium Tweezer Apparatus for Quantum Computing
• All-to-all connectivity of Rydberg-atom-based quantum processors with messenger qubits
• $\Lambda$-Enhanced Gray Molasses Cooling of ${}^{85}$Rb Atoms in Tweezers Using the D${}_2$ Line