Sound Propagation in Elongated Bose-Einstein Condensed Clouds

Abstract

We consider propagation of sound pulses along the long axis of a Bose-Einstein condensed cloud in a very anisotropic trap. In the linear regime, we demonstrate that the square of the velocity of propagation is given by the square of the local sound velocity, $c^2=n{U}_0/m$, averaged over the cross section of the cloud. We also carry out calculations in the nonlinear regime, and determine how the speed of the pulse depends on its amplitude.

4 pages, revtex, 3 eps figures

References in corpus (1)

• Sound propagation in a cylindrical Bose-condensed gas

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