Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.32: Poster
Donnerstag, 17. März 2011, 16:30–19:30, P1
Quantum dynamics in the bosonic Josephson junction — •Moritz Hiller1, Maya Chuchem2, Katrina Smith-Mannschott3,4, Tsampikos Kottos3, Amichay Vardi5,6, and Doron Cohen2 — 1Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg — 2Department of Physics, Ben-Gurion University of the Negev, P.O.B. 653, Beer-Sheva 84105, Israel — 3Department of Physics, Wesleyan University, Middletown, Connecticut 06459, USA — 4MPI für Dynamik und Selbstorganisation, Bunsenstraße 10, 37073 Göttingen — 5Department of Chemistry, Ben-Gurion University of the Negev, P.O.B. 653, Beer-Sheva 84105, Israel — 6ITAMP, Harvard-Smithsonian CFA, 60 Garden St., Cambridge, Massachusetts 02138, USA
We employ a semiclassical picture to study dynamics in a bosonic Josephson junction with various initial conditions [1]. Phase-diffusion of coherent preparations in the Josephson regime is shown to depend on the initial relative phase between the two condensates. For initially incoherent condensates, we find a universal value for the buildup of coherence in the Josephson regime. In addition, we contrast two seemingly similar on-separatrix coherent preparations, finding striking differences in their convergence to classicality as the number of particles increases.
[1] M. Chuchem et al., Phys. Rev. A 82, 053617 (2010)