Hannover 2013 – scientific programme

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A: Fachverband Atomphysik

A 32: Ultra-cold atoms, ions and BEC VI (with Q)

A 32.5: Talk

Thursday, March 21, 2013, 12:00–12:15, B 305

The impact of spatial correlation on the tunneling dynamics of few-boson mixtures — •Lushuai Cao, Ioannis Brouzos, Budhaditya Chatterjee, and Peter Schmelcher — Zentrum für Optische Quantentechnologien, Universität Hamburg, Germany

We investigate the tunneling properties of a two-species few-boson mixture in a one dimensional triple well and harmonic trap. The mixture is prepared in an initial state with a strong spatial correlation for one species and a complete localization for the other species. We observe a correlation induced tunneling process in the weak interspecies interaction regime. The onset of the interspecies interaction disturbs the spatial correlation of one species and induces tunneling among the correlated wells. The corresponding tunneling properties can be controlled by the spatial correlations with an underlying mechanism which is inherently different from the well known resonant tunneling process. We also observe the correlated tunneling of both species in the intermediate interspecies interaction regime and the tunneling via higher band states for strong interactions.