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Contribution Robert Morsch to BMBF-Networking Event Quantum Computing

Authors: Robert Morsch; Johannes Görlitz; Benjamin Kambs; Dennis Herrmann; Philipp Fuchs; Pierre-Olivier Colard; David Hardeman; +2 Authors

Contribution Robert Morsch to BMBF-Networking Event Quantum Computing

Abstract

Das Ziel des Gesamtverbundes Photonisch-Integrierter Quantencomputer (QPIC-1) ist die Realisierung eines photonischen Quantencomputers durch gezielte Manipulation von photonischen Clusterzuständen auf Basis optisch integrierter Chips.Hierzu wird die deterministische Erzeugung der zentralen Ressource für einen photonischen Quantencomputer, d.h. von photonischen Clusterzuständen, benötigt. Photonische Clusterzustände sind verschränkte Zustände aus vielen Photonen, die durch spezielle Verschränkungsbeziehungen unter den einzelnen Photonen charakterisiert sind.Im Teilvorhaben "Erzeugung von Clusterzuständen für photonisch integrierte Quantencomputer" sollen zunächst eindimensionalen Clusterzustände hergestellt werden, Generell sind für photonisches Quantum Computing allerdings höherdimensionaleClusterzustände notwendig; diese sollen durch Fusions-Gatter aus eindimensionalen Clusterzuständen erzeugt werden. Basis für die Erzeugung von photonischen Clusterzuständen ist die deterministische Emission von ununterscheidbaren Photonen, die aus einem einzelnen Farbzentrum in Diamant emittiert werden und die eine Verschränkung mit einem internen Freiheitsgrad, d.h. dem Elektronenspin des Farbzentrums aufweisen. Der Vorteil dieses Ansatzes liegt in der Kombination äußerst vorteilhafter Eigenschaften der Farbzentren wie lange Spinkohärenzzeit, Emission Fourier-limitierter Einzelphotonen und Integrierbarkeit in nanophotonische Strukturen zur Erhöhung der Effizienz der Photonenerzeugung. Wir zeigen hier die Ergebnisse vorbereitender experimenteller Arbeiten, wie die Stabilisierung der Photonenemission aus Zinn-Fehlstellen-Zentren in Diamant, die Charakterisierung der Spin-Eigenschaften und die Untersuchung der Ununterscheidbarkeit einzelner Photonen.

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Keywords

Quantum Computing, Quantum Communication

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