Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 54: Quantum Effects: QED

Q 54.2: Talk

Thursday, March 17, 2011, 14:45–15:00, SCH A01

Observation of time-dependent, third-order correlations in cavity QED — •Markus Koch, Christian Sames, Maximilian Balbach, Haytham Chibani, Alexander Kubanek, Tatjana Wilk, Karim Murr, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching

A single two-level atom strongly coupled to a high-finesse cavity is a text book example of a dissipative quantum system, ideally suited to study fundamental effects of light-matter interaction. We probe its dynamics by evaluating time-dependent correlation functions of the light that is emitted from the system when it is driven by a probe beam. We present measurements of the second-order correlation function showing both vacuum Rabi oscillations, i.e. the coherent exchange of single photons between the atom and the cavity mode, and the coherent exchange of energy between the driving laser and the coupled atom-cavity system. Furthermore, we introduce third-order correlation functions as a new tool to observe effects involving the correlated emission of three photons. We find evidence for the coherent emission and reabsorption of single photons in the presence of another photon and show that the fluctuations of the transmitted intensity are asymmetric in time.