Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2002-10-28
Physics
Condensed Matter
Soft Condensed Matter
8 pages, 5 figures
Scientific paper
We discuss the possible observation of a new type of standing nonlinear atomic matter wave in the condensate: the nonlinear impurity mode. It is investigated dynamical effects of a bright soliton in Bose-Einstein-condensed (BEC) systems with local space variations of the two-body atomic scattering length. A rich dynamics is observed in the interaction between the soliton and an inhomogeneity. Processes as trapping, reflection and transmission of the bright matter soliton due to the impurity are studied considering an analytical time-dependent variational approach and also by full numerical simulation. A condition is obtained for the collapse of the bright solitary wave in the quasi-one-dimensional BEC with attractive local inhomogeneity.
Abdullaev Fatkhulla Kh.
Gammal Arnaldo
Tomio Lauro
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