Laser-driven Sisyphus cooling in an optical dipole trap

Abstract

We propose a novel Sisyphus cooling scheme for atoms confined in a far off resonance optical dipole trap. Utilizing the differential trap-induced AC Stark shift, two electronic levels of the atom are resonantly coupled by a cooling laser preferentially near the trap bottom. After absorption of a cooling photon, the atom loses energy by climbing the steeper potential, and then spontaneously decays preferentially away from the trap bottom. The proposed method is particularly suited to cooling alkaline-earth-like atoms where two-level systems with narrow electronic transitions are present. Numerical simulations for the cases of ${}^{88}$Sr and ${}^{174}$Yb demonstrate the expected recoil and Doppler temperature limits. The method requires a relatively small number of scattered photons and can potentially lead to phase space densities approaching quantum degeneracy in sub-second timescales.

9 pages, 8 figures

References in corpus (18)

• Demonstration of a neutral atom controlled-NOT quantum gate
• Laser cooling of a diatomic molecule
• Entanglement of two individual neutral atoms using Rydberg blockade
• Two-orbital SU(N) magnetism with ultracold alkaline-earth atoms
• New Limits on Coupling of Fundamental Constants to Gravity Using ${}^{87}$Sr Optical Lattice Clocks
• Quantum computing with alkaline earth atoms
• Direct excitation of the forbidden clock transition in neutral 174Yb atoms confined to an optical lattice
• Long-lived Bloch oscillations with bosonic Sr atoms and application to gravity measurement at micrometer scale
• Stopping supersonic oxygen with a series of pulsed electromagnetic coils: A molecular coilgun
• ${}^{87}$Sr lattice clock with inaccuracy below 10${}^{-15}$
• Large Momentum Beamsplitter using Bloch Oscillations
• Single-Photon Atomic Cooling
• Sympathetic cooling in an optically trapped mixture of alkali and spin-singlet atoms
• Continuous Loading of a Conservative Trap from an Atomic Beam
• Atomic Interactions in Precision Interferometry Using Bose-Einstein Condensates
• A pulsed Sisyphus scheme for laser cooling of atomic (anti)hydrogen
• Fast polarimetry system for the application to spin quantum non-demolition measurement
• Collision-assisted Zeeman cooling of neutral atoms

Cited by in corpus (11)

• Alkaline earth atoms in optical tweezers
• 2000-times repeated imaging of strontium atoms in clock-magic tweezer arrays
• Mid-circuit measurements on a single species neutral alkali atom quantum processor
• Repetitive readout and real-time control of nuclear spin qubits in ${}^{171}$Yb atoms
• Narrow-line imaging of single strontium atoms in shallow optical tweezers
• A strontium quantum-gas microscope
• Sisyphus Optical Lattice Decelerator
• Quantum Non-Demolition Measurement on the Spin Precession of Laser-Trapped ${}^{171}$Yb Atoms
• Narrowline cooling of dysprosium atoms in an optical tweezer array
• Continuous loading of an atom beam into an optical lattice
• Differential polarizability at 1064 nm of the strontium intercombination transition