Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 10: Quantum Gases: Bosons II

Q 10.8: Talk

Monday, March 8, 2010, 18:15–18:30, E 001

Exact Quantum Dynamics of a Bosonic Josephson Junction — •Kaspar Sakmann, Alexej I. Streltsov, Ofir E. Alon, and Loerenz S. Cederbaum — Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Deutschland

The quantum dynamics of a one-dimensional bosonic Josephson junction is studied by solving the time-dependent many-boson Schrödinger equation numerically exactly. Already for weak interparticle interactions and on short time scales, the commonly employed mean-field and many-body methods are found to deviate substantially from the exact dynamics. The system exhibits rich many-body dynamics such as enhanced tunneling and a novel equilibration phenomenon of the junction depending on the interaction, which is attributed to a quick loss of coherence.