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Abstract

Considering the interspecies and intraspecies interactions as being repulsive, we study the dynamic behaviors of the gray-gray and black-black solitons in two-species Bose-Einstein condensates trapped in the harmonic external potentials. The results show that in the absence of the axial trapping frequencies, both the gray-gray and black-black solitons can keep localization stable. In the presence of the axial trapping frequencies, the gray-gray can be converted into bright-bright solitons.

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Funds:Project supported by the National Natural Science Foundation of China (Grant No. 61367003), the Science and Technology Foundation of Guizhou Province, China (Grant No. J20122314), and the Research Foundation of Education Bureau of Henan Province, China (Grant No. 14B140014).

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Vol. 63, Issue 20 - 2014-10-20

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