From multimode to monomode guided atom lasers: an entropic analysis

We have experimentally demonstrated a high level of control of the mode populations of guided atom lasers (GALs) by showing that the entropy per particle of an optically GAL, and the one of the trapped Bose Einstein condensate (BEC) from which it has been produced are the same. The BEC is prepared i...

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Bibliographic Details
Published in:arXiv.org 2009-05
Main Authors: Gattobigio, G L, Couvert, A, Jeppesen, M, Mathevet, R, Guery-Odelin, D
Format: Article
Language:English
Subjects:
Atom lasers
Dipoles
Lasers
Online Access:Get full text
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Summary:We have experimentally demonstrated a high level of control of the mode populations of guided atom lasers (GALs) by showing that the entropy per particle of an optically GAL, and the one of the trapped Bose Einstein condensate (BEC) from which it has been produced are the same. The BEC is prepared in a crossed beam optical dipole trap. We have achieved isentropic outcoupling for both magnetic and optical schemes. We can prepare GAL in a nearly pure monomode regime (85 % in the ground state). Furthermore, optical outcoupling enables the production of spinor guided atom lasers and opens the possibility to tailor their polarization.
ISSN:2331-8422
DOI:10.48550/arxiv.0905.4938