Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 36: Ultracold plasmas and Rydberg systems I (joint session Q/A)

Q 36.1: Talk

Wednesday, March 11, 2020, 14:00–14:15, f342

Free-space QED with Rydberg superatoms — •Nina Stiesdal, Hannes Busche, and Sebastian Hofferberth — University of Southern Denmark, Odense, Denmark

Rydberg quantum optics (RQO) allows to create strong optical nonlinearites at the level of individual photons by mapping the strong interactions between collective Rydberg excitations onto optical photons.

The strong interactions lead to a blockade effect such that an optical medium smaller than the blockaded volume only supports a single excitation creating a so-called Rydberg superatom. Due to the collective nature of the excitation, the superatom effectively represents a single emitter coupling strongly to few-photon probe fields with directional emission into the initial probe mode.

Here we discuss how we use Ryderg superatoms to study the dynamics of single two level systems strongly coupled to quantized propagating light fields, enabling e.g. the investigation of three-photon correlations mediated by a single quantum emitter.

We also show our experimental progress towards implementing a cascaded quantum system by interfacing multiple superatoms with a single probe mode.