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Q: Fachverband Quantenoptik und Photonik

Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie

Q 57.68: Poster

Donnerstag, 17. März 2011, 16:30–19:30, P1

A new cavity QED apparatus at work — •Haytham Chibani, Markus Koch, Christian Sames, Maximilian Balbach, Alexander Kubanek, Alexei Ourjoumstev, Pepijn Pinkse, Karim Murr, Tatjana Wilk, and Gerhard Rempe — Max Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany

Manipulating the dynamical processes of individual quantum systems quantum by quantum, is one of the most important goals in modern physics. Our quantum system consists of a single atom strongly coupled to a single mode of an optical resonator. We developed a new setup [1] which features an asymmetric cavity with one of the mirrors having a higher transmission. The resulting higher information rate allows an efficient implementation of a real-time feedback scheme which cools the motion of a single atom trapped inside the resonator and, hence, also increases its storage time. The longer storage time in conjunction with the enhanced transmission increases the effective duty cycle of the experiment by almost 3 orders of magnitude compared to our previous work [2]. This paves the way to measure higher order intensity correlations of the transmitted probe light. As a first step towards this goal, we measured the time-dependent three-photon correlation function of the probe light while single atoms were passing through the cavity mode. These measurements provide unique information on the system dynamics, in particular on the doubly excited dressed states.

[1] M. Koch et al., Phys. Rev. Lett. 105, 173003 (2010)

[2] A. Kubanek et al., Nature 462, 898-901 (2009)