Faraday Patterns in low-dimensional Bose-Einstein Condensates

Details Faraday Patterns in low-dimensional Bose-Einstein Condensates Faraday Patterns in low-dimensional Bose-Einstein Condensates

2003-09-25

arxiv.org/abs/cond-mat/0309578v1

Physics

Condensed Matter

Soft Condensed Matter

Submitted to PRA

Scientific paper

10.1103/PhysRevA.70.011601

We show that Faraday patterns can be excited in the weak confinement space of low-dimensional Bose-Einstein condensates by temporal modulation of the trap width, or equivalently of the trap frequency Omega_tight, in the tight confinement space. For slow modulation, as compared with Omega_tight, the low-dimensional dynamics of the condensate in the weak confinement space is described by a Gross-Pitaevskii equation with time modulated nonlinearity coefficient. For increasing modulation frequencies a noticeable reduction of the pattern formation threshold is observed close to 2*Omega_tight, which is related to the parametric excitation of the internal breathing mode in the tight confinement space. These predictions could be relevant for the experimental excitation of Faraday patterns in Bose-Einstein condensates.

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