Düsseldorf 2007 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 50: Ultrakalte Atome (Einzelne Teilchen und Ionenfallen)

Q 50.1: Talk

Wednesday, March 21, 2007, 16:30–16:45, 5D

Deterministic strong coupling of a well-controlled number of trapped atoms to the mode of a high-finesse optical resonator — •Mkrtych Khudaverdyan, Wolfgang Alt, Igor Dotsenko, Mkrtych Khudaverdyan, Dieter Meschede, Dieter Meschede, Sebastian Reick, and Arno Rauschenbeutel — Institut für Angewandte Physik, Wegelerstr. 8, D-53115 Bonn

To realize quantum information processing with neutral atoms, controlled coherent interaction between them is a fundamental requirement. One approach relies on deterministic coupling of two or more atoms to the mode of a high-finesse optical resonator in the strong coupling regime. An essential prerequisite for all known entanglement schemes is the stability of the atom-photon coupling strength.

We present our latest results on the deterministic placement of a few atoms down to a single atom inside the mode of a high-finesse resonator. This is achieved by combing our number-triggered loading technique with the ability to place atoms at a predetermined position along our conveyor belt with sub-micrometer precision. The presence of atoms inside the resonator is detected by monitoring the modification of the transmission of a probe laser beam. Long observation times up to several seconds are achieved by choosing appropriate settings of cavity and probe laser beam parameters. In addition, we discuss the quantification, stabilization and optimization of the atom-photon coupling strength.