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Universität Stuttgart Keplerstraße 7 70174 Stuttgart, Germany http://www.uni-stuttgart.de
Contact Mr Prof. Dr. Christoph Becher +49 681 3022466
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Universität Stuttgart

Lichtquanten fit für die Datenautobahn

Physiker der Universitäten Stuttgart und des Saarlands kooperieren

(PresseBox) (Stuttgart, )
Technologien wie Quantenkommunikation oder Quantencomputer eröffnen völlig neue Perspektiven wie prinzipiell abhörsicheren Datenaustausch oder die sekundenschnelle Berechnung komplexer Probleme. Bei diesen Technologien spielen einzelne Lichtteilchen, so genannte Lichtquanten oder Photonen, eine fundamentale Rolle als Informationsträger. Die Wellenlänge dieser Photonen liegt oft im sichtbaren Spektralbereich. Das macht sie für den Versand durch lange Glasfaserkabel ungeeignet. Physiker der Universität des Saarlandes und der Universität Stuttgart haben nun in einem gemeinsamen Experiment gezeigt, wie man diese Probleme lösen kann, indem sie die Wellenlänge einzelner Photonen mithilfe eines Kristalls gezielt veränderten. Die wissenschaftliche Arbeit wurde jetzt in der renommierten Fachzeitschrift "Physical Review Letters"*) veröffentlicht.


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