Surface of a Bose-Einstein condensed atomic cloud

U. Al Khawaja, C. J. Pethick, H. Smith

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)


We investigate the structure and collective modes of a planar surface of a trapped Bose-Einstein condensed gas at zero temperature. In the long-wavelength limit we find a mode similar to the gravity wave on the surface of a fluid with the frequency [Formula Presented] and the wave number q related by [Formula Presented] Here F is the force due to the confining potential at the surface and m is the particle mass. At shorter wavelengths we use a variational approach and find corrections to [Formula Presented] of order [Formula Presented] We demonstrate the usefulness of the concept of an effective surface tension for describing both static and dynamic properties of condensed atomic clouds.

Original languageEnglish
Pages (from-to)1507-1512
Number of pages6
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number2
Publication statusPublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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