Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 29: Poster: Ultra-cold atoms, ions and BEC (with Q)

A 29.21: Poster

Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof

Investigation of two ultra-cold dipolar particles in a trap — •Bruno Schulz, Philipp-Immanuel Schneider, Simon Sala, and Alejandro Saenz — Institut für Physik, Humboldt Universität zu Berlin, Germany

Ultra-cold dipolar gases have lead to novel phenomena in the regime of degenerate many-body quantum systems. The interaction strength of such systems can easily be varied by external homogeneous electric or magnetic fields depending on the type of dipoles. Therefore, a high degree of control can be achieved on the quantum states of such systems. Those dipolar quantum gases are interesting candidates for applications like quantum computation due to their strong dipole-dipole interaction that often acts on a longer distance than the standard atom-atom interaction. Despite the large interest in ultra-cold dipolar quantum gases, a fully theoretical description of two dipolar particles interacting via a short-range contact interaction and the dipole-dipole interaction in a trap is not known. Therefore, our group developed an approach to solve the time-independent Schrödinger equation with a realistic full Born-Oppenheimer interatomic interaction potential and the long-range anisotropic dipole-dipole interaction in three dimensions in a finite optical lattice. The understanding of the pair interaction of two particles interacting via dipole-dipole interaction could help to understand general properties of such systems and to obtain improved parameters for Ising-type models. As a first step towards the understanding we present and discuss the energy spectra and pair densities of two ultra-cold dipolar particles in a harmonic trap.