Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2001-03-27
Phys. Rev. E 63 (2001) 056704 (1-9)
Physics
Condensed Matter
Soft Condensed Matter
9 pages, 10 figures, accepted in Physical Review E
Scientific paper
10.1103/PhysRevE.63.056704
We present a numerical study of the coupled time-dependent Gross-Pitaevskii equation, which describes the Bose-Einstein condensate of several types of trapped bosons at ultralow temperature with both attractive and repulsive interatomic interactions. The same approach is used to study both stationary and time-evolution problems. We consider up to four types of atoms in the study of stationary problems. We consider the time-evolution problems where the frequencies of the traps or the atomic scattering lengths are suddenly changed in a stable preformed condensate. We also study the effect of periodically varying these frequencies or scattering lengths on a preformed condensate. These changes introduce oscillations in the condensate which are studied in detail. Good convergence is obtained in all cases studied.
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