Low velocity quantum reflection of Bose-Einstein condensates.

Pasquini, T A; Saba, M; Jo, G-B; Shin, Y; Ketterle, W; Pritchard, D E; Savas, T A; Mulders, N

Pasquini, T A; Saba, M; Jo, G-B; Shin, Y; Ketterle, W; Pritchard, D E; Savas, T A; Mulders, N.

Afiliación

Pasquini TA; Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Phys Rev Lett ; 97(9): 093201, 2006 Sep 01.

Article en En | MEDLINE | ID: mdl-17026359

RESUMEN

We study how interactions affect the quantum reflection of Bose-Einstein condensates. A patterned silicon surface with a square array of pillars resulted in high reflection probabilities. For incident velocities greater than 2.5 mm/s, our observations agreed with single-particle theory. At velocities below 2.5 mm/s, the measured reflection probability saturated near 60% rather than increasing towards unity as predicted by the accepted theoretical model. We extend the theory of quantum reflection to account for the mean-field interactions of a condensate which suppresses quantum reflection at low velocity. The reflected condensates show collective excitations as recently predicted.

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Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Phys Rev Lett Año: 2006 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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