Narrow Line Cooling: Finite Photon Recoil Dynamics
- 13 August 2004
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 93 (7), 073003
- https://doi.org/10.1103/physrevlett.93.073003
Abstract
We present an extensive study of the unique thermal and mechanical dynamics for narrow-line cooling on the - transition. For negative detuning, trap dynamics reveal a transition from the semiclassical regime to the photon-recoil-dominated quantum regime, yielding an absolute minima in the equilibrium temperature below the single-photon-recoil limit. For positive detuning, the cloud divides into discrete momentum packets whose alignment mimics lattice points on a face-centered-cubic crystal. This novel behavior arises from velocity selection and “positive feedback” acceleration due to a finite number of photon recoils. Cooling is also achieved with blue-detuned light around a velocity where gravity balances the radiative force.
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