Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics III

Q 62.4: Poster

Thursday, March 26, 2015, 17:00–19:00, C/Foyer

Rydberg quantum optics in ultracold gases — •Ivan Mirgorodskiy, Hannes Gorniaczyk, Christoph Tresp, Sebastian Weber, and Sebastian Hofferberth — 5. Physikalisches Institut, Universität Stuttgart, Germany

Mapping the strong interaction between Rydberg excitations in ultracold atomic ensembles onto single photons via electromagnetically induced transparency enables manipulation of light on the single photon level. We report the realization of a free-space single-photon transistor, where a single gate photon controls the transmission of more than 60 source photons. We show that this transistor can also be operated as a quantum device, where the gate input state is retrieved from the medium after the transistor operation. In addition, we demonstrate general theoretical techniques for the dynamic description of Rydberg pair state admixture at nonzero interaction angles with respect to the quantization axis. This model explains our experimental observation of dipolar dephasing of D-states.