Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2004-04-14
The European Physical Journal D 33, 447-451 (2005).
Physics
Condensed Matter
Soft Condensed Matter
5 pages, 3 figures, title, abstract, results changed, references added. to appear in The European Physical Journal D
Scientific paper
10.1140/epjd/e2005-00072-2
We propose an experiment in which long wavelength discrete axial quasiparticle modes can be imprinted in a 3D cigar-shaped Bose-Einstein condensate by using two-photon Bragg scattering experiments, similar to the experiment at the Weizmann Institute [J. Steinhauer {\em et al.}, Phys. Rev. Lett. {\bf 90}, 060404 (2003)] where short wavelength axial phonons with different number of radial modes have been observed. We provide values of the momentum, energy and time duration of the two-photon Bragg pulse and also the two-body interaction strength which are needed in the Bragg scattering experiments in order to observe the long wavelength discrete axial modes. These discrete axial modes can be observed when the system is dilute and the time duration of the Bragg pulse is long enough.
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