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Q: Quantenoptik und Photonik

Q 37: Poster Teilchenoptik

Q 37.1: Poster

Thursday, March 25, 2004, 14:00–16:00, Schellingstr. 3

How non-linearity makes condensate interferometers work — •Antonio Negretti¹, Carsten Henkel¹, and Tommaso Calarco² — ¹Universitaet Potsdam, Institut fuer Physik, Germany — ²ECT*, Strada delle Tabarelle 286, 38050 Villazzano (Trento), Italy

We study the dynamics of Bose-Einstein condensates in time-dependent microtraps for the purpose of understanding the influence of the mean field interaction on the performance of interferometers. We show that the non-linearity in ultracold bosons increases the sensitivity of interferometers to a phase shift, under some conditions. This feature is connected with the adiabatic generation of a dark soliton. We analyze the robustness of this phenomenon with respect to thermal fluctuations, due to excited near fields in an electromagnetic surface trap.