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Sound Propagation in Elongated Bose-Einstein Condensed Clouds | | G. M. Kavoulakis
; C. J. Pethick
; | | Date: |
21 Nov 1997 | | Journal: | Phys. Rev. A, 58 (1998) 1563 | | Subject: | cond-mat | | Affiliation: | Nordita) and C. J. Pethick (Nordita and Physics Dept., Univ. of Illinois | | 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, $c^2=nU_0/m$, 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. | | Source: | arXiv, cond-mat/9711224 | | Services: | Forum | Review | PDF | Favorites | |
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