The solitons redistribution in Bose-Einstein condensate in quasiperiodic optical lattice

Details The solitons redistribution in Bose-Einstein condensate in quasiperiodic optical lattice The solitons redistribution in Bose-Einstein condensate in quasiperiodic optical lattice

2007-04-30

arxiv.org/abs/0704.3997v1

Nonlinear Sciences

Pattern Formation and Solitons

16 pages, 6 figures

Scientific paper

10.1016/j.physleta.2007.05.012

We numerically study the dynamical excitations in Bose-Einstein condensate (BEC) placed in periodic and quasi-periodic 2D optical lattice (OL). In case of the repulsive mean-field interaction the BEC quantum tunnelling leads to a progressive soliton's splitting and generating of secondary solitons, which migrate to closest trapping potential minima. A nontrivial soliton dynamics appears when a series of pi-pulses (phase kicks) are applied to the optical lattice. Such sudden perturbation produces a dynamic redistribution of the secondary solitons, leading to a formation of an artificial solitonic superlattice. Different geometries of OL are analyzed.

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