Collective excitations of a trapped Bose-Einstein condensate in the presence of a 1D optical lattice

Details Collective excitations of a trapped Bose-Einstein condensate in the presence of a 1D optical lattice Collective excitations of a trapped Bose-Einstein condensate in the presence of a 1D optical lattice

2002-10-10

arxiv.org/abs/cond-mat/0210240v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.90.140405

We study low-lying collective modes of a horizontally elongated 87Rb condensate produced in a 3D magnetic harmonic trap with the addition of a 1D periodic potential which is provided by a laser standing-wave along the horizontal axis. While the transverse breathing mode results unperturbed, quadrupole and dipole oscillations along the optical lattice are strongly modified. Precise measurements of the collective mode frequencies at different height of the optical barriers provide a stringent test of the theoretical model recently introduced [M.Kraemer et al. Phys. Rev. Lett. 88 180404 (2002)].

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