A quasi-monomode guided atom laser from an all-optical Bose-Einstein condensate

被引：70

作者：

Couvert, A. ^{[1
]}

Jeppesen, M. ^{[1
,2
]}

Kawalec, T. ^{[1
]}

Reinaudi, G. ^{[1
]}

Mathevet, R. ^{[3
]}

Guery-Odelin, D. ^{[1
,3
]}

机构：

[1] Ecole Normale Super, CNRS UMR 8852, Lab Kastler Brossel, F-75005 Paris, France

[2] Australian Natl Univ, Australian Ctr Quantum Atom Opt, Dept Phys, Canberra, ACT 0200, Australia

[3] Univ Toulouse 3, IRSAMC, CNRS UMR 5589, Lab Collis Agregats React, F-31062 Toulouse 4, France

来源：

EPL | 2008年 / 83卷 / 05期

关键词：

D O I：

10.1209/0295-5075/83/50001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the achievement of an optically guided and quasi-monomode atom laser, in all spin projection states (m(F) = -1, 0 and +1) of F = 1 in rubidium 87. The atom laser source is a Bose-Einstein condensate (BEC) in a crossed dipole trap, purified to any one spin projection state by a spin-distillation process applied during the evaporation to BEC. The atom laser is outcoupled by an inhomogenous magneticfield, applied along the waveguide axis. The mean excitation number in the transverse modes is < n > = 0.65 +/- 0.05 for m(F) = 0 and < n > = 0.8 +/- 0.3 for the low-field seeker m(F) = -1. Using a simple thermodynamical model, we infer from our data the population in each excited mode. Copyright (c) EPLA, 2008.

引用

页数：6

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