Dispersion Control for Matter Waves and Gap Solitons in Optical Superlattices
Date
2005
Authors
Louis, P J Y
Ostrovskaya, Elena
Kivshar, Yuri
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Publisher
American Physical Society
Abstract
We present a numerical study of dispersion manipulation and formation of matter-wave gap solitons in a Bose-Einstein condensate trapped in an optical superlattice. We demonstrate a method for controlled generation of matter-wave gap solitons in a stationary lattice by using an interference pattern of two condensate wave packets, which mimics the structure of the gap soliton near the edge of a spectral band. The efficiency of this method is compared to that of gap soliton generation in a moving lattice recently demonstrated experimentally by Eiermann [Phys. Rev. Lett., 92, 230401 (2004)]. We show that, by changing the relative depths of the superlattice wells, one can fine-tune the effective dispersion of the matter waves at the edges of the minigaps of the superlattice Bloch-wave spectrum and, therefore, effectively control both the peak density and the spatial width of the emerging gap solitons.
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Keywords
Keywords: Electron traps; Energy gap; Lattice vibrations; Optical variables control; Solitons; Bose-Einstein condensates; Dispersion control; Gap solitons; Spectral band; Dispersion (waves)
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Source
Physical Review A: Atomic, Molecular and Optical Physics
Type
Journal article
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2037-12-31
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