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Recent developments in the study of ultracold Rydberg gases demand an advanced level of experimental sophistication, in which high atomic and optical densities must be combined with excellent control of external fields and sensitive Rydberg atom detection. We describe a tailored experimental system used to produce and study Rydberg-interacting atoms excited from dense ultracold atomic gases. The experiment...
Coherent population trapping (CPT) and the related phenomenon of Electromagnetically Induced Transparency (EIT) are paradigms for quantuminterference effects and have been studied intensely over the last decade [1]. Only recently, EIT involving Rydberg states has attracted much interest, with regard to nonlinear optics [2] as well as in the context of quantum information processing [3]. Whereas CPT...
A combination of ethanolic extracts from nine medicinal plants is successfully used in STW 5 (Iberogast ® ) for treatment of gastrointestinal disorders. To elucidate possible modes of action, the focus of this study is on antioxidant properties of the phytomedicine STW 5. In fact, functional gastrointestinal diseases, such as non-ulcer dyspepsia (NUD) and irritable bowel syndrome, are often...
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