Quantum Optics Seminar by Prof. Tilman Pfau – Niels Bohr Institute - University of Copenhagen

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Quantum Optics Seminar by Prof. Tilman Pfau

We report on laser spectroscopy results obtained in a dense and frozen Rydberg gas. Here the long-range strong and repulsive van der Waals interaction is responsible for novel many-body physics. Universal scaling behaviour due to an underlying quantum phase transition is observed [1].

On the other hand novel molecular bonds resulting in ultralong-range Rydberg dimers and trimers can be investigated [2].

Finally we report on our effort to realize mesoscopic quantum ensembles based on thermal microscopic vapour cells [3].