Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects

Q 30.1: Poster

Tuesday, March 18, 2014, 16:30–18:30, Spree-Palais

Strongly interacting single photons in an ultra-cold Rydberg gas — •Johannes Schmidt, Hannes Gorniaczyk, Christoph Tresp, and Sebastian Hofferberth — 5. Physikalisches Institut, Universität Stuttgart, Germany

Strong photon-photon coupling can be achieved in highly nonlinear media such as Rydberg atoms under the condition of electromagnetically induced transparency (EIT). Such a system enables the implementation of fundamental building blocks for photonic quantum information processing. More fundamentally, interacting Ryberg polaritons in a strongly correlated many-body system can be observed.

On this poster, we present our experimental apparatus to implement Rydberg-mediated few-photon nonlinearities in an high optical density medium (OD>200), consisting of ultracold Rb87 atoms in an optimized crossed optical dipole trap. We discuss how this setup can be used to implement a deterministic few-photon absorber and a few-photon switch. Recent results from these experiments are reported.