Ansatz from Non-Linear Optics Applied to Trapped Bose-Einstein Condensates

Details Ansatz from Non-Linear Optics Applied to Trapped Bose-Einstein Condensates Ansatz from Non-Linear Optics Applied to Trapped Bose-Einstein Condensates

2007-03-29

arxiv.org/abs/cond-mat/0703779v1

Phys. Rev. A 75, 035601 (2007)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures, published version

Scientific paper

10.1103/PhysRevA.75.035601

A simple analytical ansatz, which has been used to describe the intensity profile of the similariton laser (a laser with self-similar propagation of ultrashort pulses), is used as a variational wave function to solve the Gross-Pitaevskii equation for a wide range of interaction parameters. The variational form interpolates between the noninteracting density profile and the strongly interacting Thomas-Fermi profile smoothly. The simple form of the ansatz is modified for both cylindrically symmetric and completely anisotropic harmonic traps. The resulting ground-state density profile and energy are in very good agreement with both the analytical solutions in the limiting cases of interaction and the numerical solutions in the intermediate regime.

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