eprintid: 21709
rev_number: 13
eprint_status: archive
userid: 2677
dir: disk0/00/02/17/09
datestamp: 2016-08-24 12:14:17
lastmod: 2016-10-07 13:22:24
status_changed: 2016-08-24 12:14:17
type: doctoralThesis
metadata_visibility: show
creators_name: Kong, Xiangjin
title: Collective effects of nuclei in single x-ray photon superradiance
subjects: ddc-530
divisions: i-130001
adv_faculty: af-13
cterms_swd: x-ray
cterms_swd: nuclei
cterms_swd: superradiance
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.
date: 2016
id_scheme: DOI
id_number: 10.11588/heidok.00021709
ppn_swb: 1658983343
own_urn: urn:nbn:de:bsz:16-heidok-217090
date_accepted: 2016-07-28
advisor: HASH(0x55a9a64bde00)
language: eng
bibsort: KONGXIANGJCOLLECTIVE2016
full_text_status: public
place_of_pub: Heidelberg, Germany
citation:   Kong, Xiangjin  (2016) Collective effects of nuclei in single x-ray photon superradiance.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/21709/1/Xiangjin%20Kong.pdf