Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-10-31
Phys. Rev. A 76 (2007) 063609
Physics
Condensed Matter
Other Condensed Matter
10 pages, 9 figures, submitted to Phys. Rev. A
Scientific paper
10.1103/PhysRevA.76.063609
Motivated by recent experiments on Faraday waves in Bose-Einstein condensates we investigate both analytically and numerically the dynamics of cigar-shaped Bose-condensed gases subject to periodic modulation of the strength of the transverse confinement. We offer a fully analytical explanation of the observed parametric resonance, based on a Mathieu-type analysis of the non-polynomial Schr{\"o}dinger equation. The theoretical prediction for the pattern periodicity versus the driving frequency is directly compared with the experimental data, yielding good qualitative and quantitative agreement between the two. These results are corroborated by direct numerical simulations of both the one-dimensional non-polynomial Schr{\"o}dinger equation and of the fully three-dimensional Gross-Pitaevskii equation.
Carretero-González Ricardo
Kevrekidis Panagiotis G.
Nicolin Alexandru I.
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