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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2011

Guided atom laser: transverse mode quality and longitudinal momentum distribution

Résumé

We analyze the outcoupling of a matter wave into a guide by a time-dependent spilling of the atoms from an initially trapped Bose-Einstein condensate. This process yields intrinsically a breakdown of the adiabatic condition that triggers the outcoupling of the wave function. Our analysis of the time-dependent engineering and manipulation of condensates in momentum space in this context enables to work out the limits due to interactions in the mode quality of a guided atom laser. This study is consistent with recent experimental observations of low transverse excitations of guided atom lasers and suggests (i) an optimal strategy to realize such quasi-monomode guided atom lasers with, in addition, the lowest possible longitudinal velocity dispersion, or alternatively (ii) a strategy for engineering the atomic flux of the atom laser.
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Dates et versions

hal-00612351 , version 1 (28-07-2011)
hal-00612351 , version 2 (08-11-2011)

Identifiants

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François Vermersch, Charlotte Fabre, Pierrick Cheiney, Giovanni L. Gattobigio, Renaud Mathevet, et al.. Guided atom laser: transverse mode quality and longitudinal momentum distribution. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2011, 84 (4), 043618 [8 p.]. ⟨10.1103/PhysRevA.84.043618⟩. ⟨hal-00612351v2⟩
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