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We study the dynamics of Bose-Einstein condensates in time-dependentmicrotraps for the purpose of understanding the influence of the mean fieldinteraction on the performance of interferometers. We identify conditions wherethe non-linearity due to atom interactions increases the sensitivity ofinterferometers to a phase shift. This feature is connected with the adiabaticgeneration of a dark soliton. We analyze the robustness of this phenomenon withrespect to thermal fluctuations, due to excited near fields in anelectromagnetic surface trap.

Enhanced phase sensitivity and soliton formation in an integrated BEC interferometer