Surface of a Bose-Einstein condensed atomic cloud

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

doi:10.1103/PhysRevA.60.1507

Surface of a Bose-Einstein condensed atomic cloud

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

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	1507-1512
Number of pages	6
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	60
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.60.1507
Publication status	Published - 1999
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1103/PhysRevA.60.1507

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AB - 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.

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Surface of a Bose-Einstein condensed atomic cloud

Abstract

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