Perfect Quantum Network Communication Protocol Based on Classical Network Coding

Details Perfect Quantum Network Communication Protocol Based on Classical Network Coding Perfect Quantum Network Communication Protocol Based on Classical Network Coding

2009-02-08

arxiv.org/abs/0902.1299v1

Physics

Quantum Physics

LaTeX2e, 10 pages, 2 figures

Scientific paper

This paper considers a problem of quantum communication between parties that are connected through a network of quantum channels. The model in this paper assumes that there is no prior entanglement shared among any of the parties, but that classical communication is free. The task is to perfectly transfer an unknown quantum state from a source subsystem to a target subsystem, where both source and target are formed by ordered sets of some of the nodes. It is proved that a lower bound of the rate at which this quantum communication task is possible is given by the classical min-cut max-flow theorem of network coding, where the capacities in question are the quantum capacities of the edges of the network.

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