Berlin 2008 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 10: Semiconductor Nanophotonics: Materials, Models, Devices - Novel Concepts

DS 10.5: Vortrag

Montag, 25. Februar 2008, 18:45–19:00, H 2032

Single Photons for Quantum Information — •Oliver Benson — Institut für Physik , Humboldt-Universität zu Berlin, Hausvogteiplatz 5-7, 10117 Berlin, Germany

Single Photons have been widely discussed as ideal carriers of the fundamental units of quantum information processing (QIP), the quantum bits. In proposals and first experimental realizations the role of photons is two-fold: First, in linear optical quantum computing (LOQC) the photons themselves as used to implement single- and two-qubit gates. Second, in quantum interfaces photons are merely used to transfer quantum information from one place to another or among different physical QIP systems.

In this contribution we introduce experimental components that are required to implement photons for both purposes. We will describe the design of efficient single photon detectors based on superconducting NbN. Additionally, we report on the realization of an interferometric time-bin encoding setup for narrow band single photons.