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From multimode to monomode guided atom lasers: an entropic analysis

Abstract : 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.
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https://hal.archives-ouvertes.fr/hal-00389839
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Submitted on : Friday, May 29, 2009 - 5:50:07 PM
Last modification on : Thursday, December 10, 2020 - 12:36:35 PM
Long-term archiving on: : Thursday, June 10, 2010 - 9:04:15 PM

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Giovanni Gattobigio, A. Couvert, M. Jeppesen, Renaud Mathevet, David Guéry-Odelin. From multimode to monomode guided atom lasers: an entropic analysis. Physical Review A, American Physical Society, 2009, 80 (4), 041605 [4 p.]. ⟨10.1103/PhysRevA.80.041605⟩. ⟨hal-00389839⟩

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