Düsseldorf 2007 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 2: Quanteninformation (Photonen und nichtklassisches Licht I)

Q 2.5: Vortrag

Montag, 19. März 2007, 11:30–11:45, 5L

Towards Storage of Photonic Qubits in Atomic Vapor — •Matthias Scholz, David Höckel, Florian Wolfgramm, Nils Neubauer, and Oliver Benson — Humboldt-Universität zu Berlin, Institut für Physik, AG Nanooptik, Hausvogteiplatz 5-7, 10117 Berlin

Over the years of quantum information research, single photons have held the fort as the primary carriers of quantum bits over long distances. While in the early times polarization was the principal physical property to encode a qubit in a single photon, the which-way information of a photon in an interferometric setup has now become the main player, increasing the robustness against decoherence by dispersion in optical fiber links that are inevitable for the transmission of photons over more than a few kilometers.

Even though single photons have the capability to perform quantum computations on their own using linear optics, their chief application in quantum information science is seen as information carriers between processing nodes in larger quantum networks. These nodes may consist of atomic, ionic, or molecular systems where information is stored or delayed in order to modify it or to make it available at a later time when parallel computational threads have successfully been performed. In this talk, we report on our progress to prepare and store photonic qubits in atomic vapor and subsequently retrieve and decode them to form a relay for quantum information.