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Phys. Rev. A 63, 033604 (2001) [4 pages]

Stabilizing an attractive Bose-Einstein condensate by driving a surface collective mode

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Arjendu K. Pattanayak, Arnaldo Gammal*, Charles A. Sackett†, and Randall G. Hulet
Department of Physics and Rice Quantum Institute, Rice University, Houston, Texas 77251-1892

Received 8 June 2000; published 6 February 2001

Bose-Einstein condensates with attractive interatomic interactions undergo collective collapse beyond a critical number. We show theoretically that if the low-lying collective modes of the condensate are excited, the radial breathing mode further destabilizes the condensate. Remarkably, excitation of the quadrupolar surface mode causes the condensate to become more stable, imparting quasiangular momentum to it. A significantly larger number of atoms may then occupy the condensate. Efforts are under way for the experimental realization of these effects.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.63.033604
DOI:
10.1103/PhysRevA.63.033604
PACS:
03.75.Fi, 32.80.Pj, 05.30.Jp, 67.40.Db

*Present address: Instituto de Física Teórica, Universidade Estadual Paulista, 01405-900 São Paulo, Brazil.

†Present address: Time and Frequency Division, National Institute of Standards and Technology, Boulder, CO 80303.

 
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