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arXiv 0803.3297nlin.PS
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非匹配光晶格对二分量物质波孤子的捕获

Trapping of two-component matter-wave solitons by mismatched optical lattices

Z. Shi, K. J. H. Law P. G. Kevrekidis, B. A. Malomed

摘要:

我们考虑一个一维模型的两个组件的玻色-爱因斯坦凝聚体中存在的周期性的外部势的相反的符号,作用在两个物种。物种之间的相互作用是吸引的,而物种内的相互作用也可能是吸引的[右亮(BB)类型的系统],或者在两个分量中具有相反的符号[间隙亮(GB)模型]。我们确定的BB和GB型孤子复合物的存在和稳定域。不稳定孤子的演化导致振荡态的建立。物种之间的非线性吸引力的强度的增加导致复合物的共生稳定,尽管事实上,一个组件是围绕各自的周期性电位的局部最大值为中心。

英文摘要:

We consider a one-dimensional model of a two-component Bose-Einstein condensate in the presence of periodic external potentials of opposite signs, acting on the two species. The interaction between the species is attractive, while intra-species interactions may be attractive too [the system of the right-bright (BB) type], or of opposite signs in the two components [the gap-bright (GB) model]. We identify the existence and stability domains for soliton complexes of the BB and GB types. The evolution of unstable solitons leads to the establishment of oscillatory states. The increase of the strength of the nonlinear attraction between the species results in symbiotic stabilization of the complexes, despite the fact that one component is centered around a local maximum of the respective periodic potential.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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