Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 57: Quantum Effects: QED II

Q 57.1: Gruppenbericht

Donnerstag, 3. März 2016, 14:30–15:00, f442

Interference and dynamics of light from a distance-controlled atom pair in an optical cavity — •Olivier Morin, Andreas Neuzner, Matthias Körber, Stephan Ritter, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching

A single atom in a cavity is the most simple system of cavity QED. Reaching control over the internal and external degrees of freedom of the atom has enabled novel quantum physical applications. Similarly, research with atomic many-body systems has led to many new insights into complex quantum systems. However, only a few experiments have attempted to bridge the two areas of research.

We report recent results in this direction by extending our system from one to two atoms in regimes typically associated with super- and sub-radiance. As for the paradigmatic double-slit experiment, we observe the fundamental role of the relative phase between possible optical paths determined by the atoms' positions. This new degree of freedom introduce non-trivial effects based on the cavity-mediated long-range interaction between the atoms. A plethora of counter-intuitive phenomena in the intensity and the photon statistics of the light emitted from the atom-driven system is observed. The reported amount of control opens up a unique way to connect cavity QED and many-body physics.