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Evaporative cooling of an atomic beam

Emmanuel Mandonnet, Anna Minguzzi, Ralph Dum +3 more

arXiv:cond-mat/9909378The European Physical Journal DMar 1, 200069 citations

Evaporation of an atomic beam on a material surface (3 pages)

Gael Reinaudi

Physical Review AJan 1, 20060 citations

Evaporative cooling of a magnetically guided atomic beam

Thierry Lahaye, Jean Dalibard

Jan 1, 20050 citations

Kinetics of the evaporative cooling of an atomic beam

Thierry Lahaye, David Guéry-Odelin

We compare two distinct models of evaporative cooling of a magnetically guided atomic beam: a continuous one, consisting in approximating the atomic distribution function by a truncated equilibrium distribution, and a discrete-step one, in which the evaporation process is described in terms of successive steps consisting in a truncation of the distribution followed by rethermalization. Calculations are performed for the semilinear potential relevant for experiments. We show that it is possible to map one model onto the other, allowing us to infer, for the discrete-step model, the rethermalization kinetics, which turns out to be strongly dependent upon the shape of the confining potential.We compare two distinct models of evaporative cooling of a magnetically guided atomic beam: a continuous one, consisting in approximating the atomic distribution function by a truncated equilibrium distribution, and a discrete-step one, in which the evaporation process is described in terms of successive steps consisting in a truncation of the distribution followed by rethermalization. Calculations are performed for the semilinear potential relevant for experiments. We show that it is possible to map one model onto the other, allowing us to infer, for the discrete-step model, the rethermalization kinetics, which turns out to be strongly dependent upon the shape of the confining potential.

arXiv:cond-mat/0601718Physical Review AJun 27, 20069 citations

Packing rubidium into quantum degeneracy

Jelena Stajic

Atomic Physics When atomic gases, such as those of alkali elements, are cooled to very low temperatures, they can reach a state of quantum degeneracy, where their quantum nature comes to the fore. In this process, the very last step is evaporative cooling, in which the hottest atoms are coaxed into leaving the gas. Hu et al. devised a protocol that evades the evaporative cooling step, is faster, and suffers less atom loss. The method rests on iteratively manipulating the laser beams of an optical lattice in which a gas of 87Rb atoms is held so that the gas becomes progressively denser. The method should be widely applicable to other atomic species. Science , this issue p. [1078][1] [1]: /lookup/doi/10.1126/science.aan5614Atomic Physics When atomic gases, such as those of alkali elements, are cooled to very low temperatures, they can reach a state of quantum degeneracy, where their quantum nature comes to the fore. In this process, the very last step is evaporative cooling, in which the hottest atoms are coaxed into leaving the gas. Hu et al. devised a protocol that evades the evaporative cooling step, is faster, and suffers less atom loss. The method rests on iteratively manipulating the laser beams of an optical lattice in which a gas of 87Rb atoms is held so that the gas becomes progressively denser. The method should be widely applicable to other atomic species. Science , this issue p. [1078][1] [1]: /lookup/doi/10.1126/science.aan5614

ScienceNov 23, 20170 citations

Laser cooling of an atomic beam

William D. Phillips, John V. Prodan, Harold J. Metcalf

Conference on Lasers and Electro-OpticsJan 1, 19831 citation

Discrete-step evaporation of an atomic beam

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