Roughness with a finite correlation length in the Microtrap

Details Roughness with a finite correlation length in the Microtrap Roughness with a finite correlation length in the Microtrap

2010-03-30

arxiv.org/abs/1003.5734v1

PRA81,033625(2010)

Physics

Condensed Matter

Quantum Gases

6 pages, 7 figures

Scientific paper

We analyze the effects of roughness in the magnitude of the magnetic field produced by a current carrying microwire, which is caused by geometric fluctuation of the edge of wire. The relation between the fluctuation of the trapping potential and the height that atom trap lies above the wire is consistent with the experimental data very well, when the colored noise with a finite correlation length is considered. On this basis, we generate the random potential and get the density distribution of the BEC atoms by solving the Gross-Pitaevskii equation, which coincides well with the experimental image, especially in the number of fragmentations. The results help us further understand the nature of the fluctuation and predict the possible application in the precise measurement.

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