Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 21: Poster I

Q 21.29: Poster

Tuesday, March 9, 2010, 16:00–19:00, Lichthof

Real-Time Feedback on Single Atoms in a High-Finesse Optical Resonator of Variable Length — •Christian Sames, Markus Koch, Alexander Kubanek, Alexei Ourjoumtsev, Matthias Apel, Pepijn Pinkse, Karim Murr, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany

Strongly coupling atoms to the light field of a high-finesse optical resonator is a key ingredient to study light-matter interaction at the single quantum level. A problem still awaiting a satisfactory solution is to keep the atom inside the resonator sufficiently long. The trapping time can be dramatically enhanced by applying real-time feedback onto the atomic motion [1]. We present improved experimental results obtained with a new setup consisting of an optical resonator with much higher information rate than in previous experiments. Moreover, the mirror spacing can be varied macroscopically, enabling us to alter physical parameters as the coupling-constant g or the cooperativity parameter C online.

[1] A. Kubanek et al., Nature 463, 898 (17th December 2009)