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Abstract
This thesis is dedicated to the study of collective effects of nuclei in single x-ray photon superradiance. To this end we investigate aspects of superradiance in both nuclear forward scattering and in thin-film cavities with an embedded 57Fe nuclear layer. A general theoretical framework is developed to investigate a single-photon cooperative emission from a cloud of resonant systems, atoms or nuclei, in the presence of magnetic hyperfine splitting. In the limit of a thick sample, we present our results for two means to coherently control the collective single x-ray photon emission in nuclear forward scattering. In the limit of a thin sample in a thin-film cavity with embedded resonant nuclei, we find out that unlike the magnetic hyperfine splitting of a single atom or nucleus, interesting collective effects may occur which modify the hyperfine level structure. In addition, for a certain parameter regime a spectrum reminiscent of electromagnetically induced transparency (EIT) can be achieved. Based on this EIT-like effect, a theoretical control mechanism for stopping x-ray pulses in the thin-film x-ray cavity is put forward. Finally, we show theoretically that for the case of two nuclear ensembles in the thin-film cavity, pseudo-Rabi splitting due to the strong coupling between the two layers should occur. The latter findings are confirmed by preliminary experimental data.
Document type: | Dissertation |
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Supervisor: | Pálffy-Buß, PD Dr. Adriana |
Place of Publication: | Heidelberg, Germany |
Date of thesis defense: | 28 July 2016 |
Date Deposited: | 24 Aug 2016 12:14 |
Date: | 2016 |
Faculties / Institutes: | The Faculty of Physics and Astronomy > Dekanat der Fakultät für Physik und Astronomie |
DDC-classification: | 530 Physics |
Controlled Keywords: | x-ray, nuclei, superradiance |