Stability and collapse of localized solutions of the controlled three-dimensional Gross-Pitaevskii equation

Details Stability and collapse of localized solutions of the controlled three-dimensional Gross-Pitaevskii equation Stability and collapse of localized solutions of the controlled three-dimensional Gross-Pitaevskii equation

2009-08-08

arxiv.org/abs/0908.1151v1

Physics

Condensed Matter

Quantum Gases

21 pages, 14 figures

Scientific paper

On the basis of recent investigations, a newly developed analytical procedure is used for constructing a wide class of localized solutions of the controlled three-dimensional (3D) Gross-Pitaevskii equation (GPE) that governs the dynamics of Bose-Einstein condensates (BECs). The controlled 3D GPE is decomposed into a two-dimensional (2D) linear Schr\"{o}dinger equation and a one-dimensional (1D) nonlinear Schr\"{o}dinger equation, constrained by a variational condition for the controlling potential. Then, the above class of localized solutions are constructed as the product of the solutions of the transverse and longitudinal equations. On the basis of these exact 3D analytical solutions, a stability analysis is carried out, focusing our attention on the physical conditions for having collapsing or non-collapsing solutions.

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