Düsseldorf 2007 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 61: Poster Quanteneffekte

Q 61.12: Poster

Thursday, March 22, 2007, 16:30–18:30, Poster C

Geometry-dependence of dipole-dipole interaction — •Sandra Isabelle Schmid and Jörg Evers — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

If atoms are nearby on a length scale given by the involved transition wavelength, the collective dynamics is influenced by the dipole-dipole interaction between the atoms. Recently, it was found that in particular the dipole-dipole coupling of transitions with orthogonal dipole moments, which was neglected in most previous works, can crucially influence the system dynamics [1,2]. Here, we discuss the geometrical properties of this dipole-dipole interaction in atomic ensembles of experimental interest by considering various atom pair setups. We find that especially in lower-dimensional samples the dipole-dipole interaction of transitions with orthogonal dipole moments cannot be neglected.

[1] G. S. Agarwal and A. K. Patnaik, Phys. Rev. A 63, 043805 (2001). [2] J. Evers, M. Kiffner, M. Macovei and C. H. Keitel, Phys. Rev. A 73, 023804 (2006)