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Q: Fachverband Quantenoptik und Photonik

Q 54: Quantum Information: Quantum Computing and Communication II

Q 54.7: Vortrag

Donnerstag, 3. März 2016, 16:00–16:15, e214

Performance analysis of large-scale quantum networks based on graphs — •Michael Epping, Hermann Kampermann, and Dagmar Bruß — Heinrich-Heine-Universität Düsseldorf, Institut für Theoretische Physik III, Düsseldorf

Quantum repeaters effectively reduce the error rates (i.e. the noise and erasures) of transmission channels, which is a necessary prerequisite of any long distance quantum communication protocol. A quantum network, containing such channels to connect the participants, can be associated with a mathematical graph. Here, each vertex corresponds to a party and each edge to a line of repeater stations.

We analyze the propagation of errors in a quantum network [1]. In particular we focus on the production of graph states shared by all parties - a natural resource of multipartite entanglement in a quantum network. Finally we show how our approach leads to schemes which efficiently employ the infrastructure of a given quantum network.

[1] M.E., H.K., and D.B., arXiv:1508.02185 [quant-ph]