Scattering of a discrete soliton by impurity in dipolar Bose-Einstein condensates

Scattering of a discrete soliton by a single impurity in dipolar Bose-Einstein condensate is investigated numerically. The results show that the increase of the strength of dipolar interactions leads to repeated reflection, transmission and trapping regions due to energy exchange between the center of mass motion and the internal modes of the impurity. However, increasing the strength of the attractive nonlocal dipole-dipole interaction will result in different scattering windows. While the dipole-dipole interaction can significantly expand the trapping region of the system, nevertheless transmission resonances through the impurity are still observed.