Berlin 2005 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 2: Poster Quantengase
Q 2.12: Poster
Freitag, 4. März 2005, 11:00–12:30, Poster HU
Merging two elongated condensates at finite temperature — •Alem Mebrahtu1,2, Anna Sanpera1, and Maciej Lewenstein1 — 1Hannover University, Institute of Theoretical Physics, Appelstras. 2, D-30167 Hannover, Germany — 2Mekelle University, Department of Physics, P.O.Box 231, Mekkele, Ethiopia
We study the merging of two spatially separated 1D Bose-Einstein condensates at finite temperature, where phase fluctuations play an important role. We show that, at zero temperature, the two condensates merge into a single one with a negligible phase difference. At finite temperatures, below the critical temperature for condensation the melting process becomes very critical, leading to an eventual destruction of the condensate. Our results may have important implications for a continuous atom laser.