Spatially-antisymmetric localization of matter wave in a bichromatic optical lattice
✍ Scribed by Y. Cheng; S.K. Adhikari
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 341 KB
- Volume
- 7
- Category
- Article
- ISSN
- 1612-2011
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✦ Synopsis
By direct numerical simulation of the timedependent Gross-Pitaevskii equation using the split-step Fourier spectral method we study the double-humped localization of a cigar-shaped Bose-Einstein condensate (BEC) in a one-dimensional bichromatic quasi-periodic optical-lattice potential, as used in a recent experiment on the localization of a BEC [G. Roati et al., Nature 453, 895 (2008)]. Such states are spatially antisymmetric and are excited modes of Anderson localization. Where possible, we have compared the numerical results with a variational analysis. We also demonstrate the stability of the localized double-humped BEC states under small perturbation.