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https://link.aps.org › doi › 10.1103 › PhysRevLett.133.013401
Laser-driven Sisyphus cooling in an optical dipole trap
We propose a laser-driven 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 ...