Sub-recoil clock-transition laser cooling enabling shallow optical lattice clocks

Abstract

Laser cooling is a key ingredient for quantum control of atomic systems in a variety of settings. In divalent atoms, two-stage Doppler cooling is typically used to bring atoms to the uK regime. Here, we implement a pulsed radial cooling scheme using the ultranarrow 1S0-3P0 clock transition in ytterbium to realize sub-recoil temperatures, down to tens of nK. Together with sideband cooling along the one-dimensional lattice axis, we efficiently prepare atoms in shallow lattices at an energy of 6 lattice recoils. Under these conditions key limits on lattice clock accuracy and instability are reduced, opening the door to dramatic improvements. Furthermore, tunneling shifts in the shallow lattice do not compromise clock accuracy at the 10-19 level.

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Cited by in corpus (10)

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• Raman Sideband Cooling of Molecules in an Optical Tweezer Array
• A hybrid atom tweezer array of nuclear spin and optical clock qubits
• Clock-line-mediated Sisyphus Cooling
• Ratchet Loading and Multi-Ensemble Operation in an Optical Lattice Clock
• Quantum Sensing Using Atomic Clocks for Nuclear and Particle Physics
• Single-atom imaging of ${}^{173}$Yb in optical tweezers loaded by a five-beam magneto-optical trap
• Laser-cooling Cadmium Bosons and Fermions with Near Ultraviolet Triplet Excitations
• Isotope-agnostic motional ground-state cooling of neutral Yb atoms