Dynamic structure factor of a Bose Einstein condensate in a 1D optical lattice

Details Dynamic structure factor of a Bose Einstein condensate in a 1D optical lattice Dynamic structure factor of a Bose Einstein condensate in a 1D optical lattice

2002-12-12

arxiv.org/abs/cond-mat/0212299v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures

Scientific paper

10.1103/PhysRevA.67.053609

We study the effect of a one dimensional periodic potential on the dynamic structure factor of an interacting Bose Einstein condensate at zero temperature. We show that, due to phononic correlations, the excitation strength towards the first band develops a typical oscillating behaviour as a function of the momentum transfer, and vanishes at even multiples of the Bragg momentum. The effects of interactions on the static structure factor are found to be significantly amplified by the presence of the optical potential. Our predictions can be tested in stimulated photon scattering experiments.

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