Frankfurt 2006 – scientific programme

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Q: Quantenoptik und Photonik

Q 75: Poster Quanteninformation

Q 75.5: Poster

Thursday, March 16, 2006, 16:30–18:30, Labsaal

Dynamical entanglement between two trapped atoms and decoherence — •Michael Bußhardt and Matthias Freyberger — Abteilung Quantenphysik, Universität Ulm, D-89069, Germany

We investigate the dynamical creation of entanglement between two cold atoms in a trapping potential. Both atoms interact via s-wave-scattering, modelled by a δ-potential, which only depends on the relative coordinate. By introducing an environment we model the effects of dissipation and decoherence. This is done by constructing a master equation for the relative wave packet and simulating the dynamics using the Monte Carlo Wave Function Method. The entanglement can be quantified by calculating the maximal violation of a Bell inequality, which is constructed using so-called pseudospin operators. The entanglement shows an oscillatory behaviour and is very sensitive to the damping constant.