The solitons redistribution in Bose-Einstein condensate in quasiperiodic optical lattice
arXiv:0704.3997 · doi:10.1016/j.physleta.2007.05.012
Abstract
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.
16 pages, 6 figures
References in corpus (11)
- Observation of Bose-Einstein Condensation of Molecules
- Two-dimensional Bose-Einstein condensate in an optical surface trap
- Asymmetric vortex solitons in nonlinear periodic lattices
- Vortex stability in nearly two-dimensional Bose-Einstein condensates with attraction
- Fully three dimensional breather solitons can be created using Feshbach resonance
- Multi-gap discrete vector solitons
- Solitons, solitonic vortices, and vortex rings in a confined Bose-Einstein condensate
- Gap solitons in quasiperiodic optical lattices
- Discrete Solitons in the Salerno Model with competing nonlinearities
- Enhanced soliton transport in quasi-periodic lattices with short-range aperiodicity
- Multi-quantum eigenstates of a linear chain of coupled qubits