Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 17: Ultra-cold atoms, ions and BEC IV (with Q)

A 17.1: Vortrag

Mittwoch, 16. März 2011, 16:30–16:45, BAR 205

Quantum dynamics of strongly interacting bosonic mixture. — •Budhaditya Chatterjee1, Ioannis Brouzos2, and Peter Schmelcher21Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany — 2Zentrum für Optische Quantentechnologien, Luruper Chaussee 149, 22761 Hamburg, Germany

We look at tunneling dynamics of strongly correlated bosonic mixture. The effect of the inter- and the intra-species interaction and their interplay is investigated using the numerically exact Multi-Configuration Time dependent Hartree (MCTDH) method. Dynamics is calculated for two initial configurations- complete population imbalanced state and phase separated state. Increasing the inter-species interaction leads to an exponential increase in the tunneling time period analogous to the quantum self-trapping for condensates. The increase of the intra-species repulsion elongates the tunneling period for small inter-species correlations while in the opposite case of stronger interaction it enhances the tunneling. These effects are explained by studying the spectra and the stationary states. The effect of higher particle number as well as number symmetry is discussed.

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