Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2004-05-19
Physics
Condensed Matter
Soft Condensed Matter
9 pages, 4 figures
Scientific paper
We propose a set-up of optical laser beams by which one may realize a quasi-one-dimensional Fibonacci array of potential wells for a Bose-Einstein condensate. We use a Bose-Hubbard tight-binding model to evaluate the transport of superfluid Rb87 atoms driven by a constant force through such an array. We show that the minigaps that are generated in the spectral density-of-states by the quasi-periodic disorder give rise to prominent localization effects, which can be observed by measuring the tunnel output of matter into vacuum as a function of the intensity of the applied force.
Eksioglu Yasa
Tosi Mario P.
Vignolo Patrizia
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