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Beam Quality of a Nonideal Atom Laser

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 24 Feb 2006Embargo end date: 01 Jan 2005 English Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 96 (issn: 0031-9007, eissn: 1079-7114, Copyright policy )
Authors: Riou, Jean-Félix; Guerin, William; Le Coq, Yann; Fauquembergue, Marie; Bouyer, Philippe; Josse, Vincent; Aspect, Alain;

doi: 10.1103/physrevlett.96.070404 , 10.48550/arxiv.cond-mat/0509281

pmid: 16606065

arXiv: cond-mat/0509281

Beam Quality of a Nonideal Atom Laser

Abstract

We study the propagation of a non-interacting atom laser distorted by the strong lensing effect of the Bose-Einstein Condensate (BEC) from which it is outcoupled. We observe a transverse structure containing caustics that vary with the density within the residing BEC. Using WKB approximation, Fresnel-Kirchhoff integral formalism and ABCD matrices, we are able to describe analytically the atom laser propagation. This allows us to characterize the quality of the non-ideal atom laser beam by a generalized M$^2$ factor defined in analogy to photon lasers. Finally we measure this quality factor for different lensing effects.

Related Organizations
Keywords

Atomic Physics (physics.atom-ph), FOS: Physical sciences, interactions, ABCD matrices, Physics - Atomic Physics, Condensed Matter - Other Condensed Matter, atom laser, Fresnel-Kirshhoff, [PHYS.COND.CM-GEN] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], [PHYS.PHYS.PHYS-ATOM-PH] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], M2 factor, Other Condensed Matter (cond-mat.other)

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    		 65
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    		 Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
65
Top 10%
Top 10%
Top 1%
Green
bronze