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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2012

Fast transitionless expansion of cold atoms in optical Gaussian-beam traps

Résumé

We study fast expansions of cold atoms in a three-dimensional Gaussian-beam optical trap. Three different methods to avoid final motional excitation are compared: inverse engineering using Lewis-Riesenfeld invariants, which provides the best overall performance, a bang-bang approach, and a fast adiabatic approach. We analyze the excitation effect of anharmonic terms, radial-longitudinal coupling, and radial-frequency mismatch. In the inverse-engineering approach these perturbations can be suppressed or mitigated by increasing the laser beam waist.

Dates et versions

hal-00911329 , version 1 (29-11-2013)

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E. Torrontegui, Xi Chen, M. Modugno, A. Ruschhaupt, David Guéry-Odelin, et al.. Fast transitionless expansion of cold atoms in optical Gaussian-beam traps. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2012, 85 (3), 033605 [9 p.]. ⟨10.1103/PhysRevA.85.033605⟩. ⟨hal-00911329⟩
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