Effects of spatially inhomogeneous atomic interactions on Bose-Einstein condensates in optical lattices

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• 作者：Golam Ali Sekh ^{sekh@sa.infn.it}
• 关键词：Bose&ndash ; Einstein condensate ; Optical lattices ; Inhomogeneous nonlinearity
• 刊名：Physics Letters A
• 出版年：2012
• 期刊代码：57_03759601
• 类别：ph
• 出版时间：23 April, 2012
• 卷：376
• 期：21
• 页码：1740-1747
• 文件大小：858 K

摘要

An interplay of optical lattices and nonlinear impurities in controlling the dynamics of Bose-Einstein condensate bright solitons is investigated using an effective potential approach. The ability of pushing the solitons into or away from the impurity region by changing both lattice and impurity parameters is suggested. A possibility for the existence of stable fundamental gap solitons, which appear to satisfy an inverted Vakhitov-Kolokolov criterion, is examined.