Fig. 1: Triangle quantum network. | Nature Communications

Fig. 1: Triangle quantum network.

From: Symmetries in quantum networks lead to no-go theorems for entanglement distribution and to verification techniques

Fig. 1

Three sources ϱa, ϱb and ϱc distribute parties to three nodes, Alice, Bob, and Charlie (A, B, and C). The colors yellow, blue, and red are associated to the sources ϱa, ϱb, and ϱc respectively. Alice, Bob, and Charlie each end up with a bipartite system X = X1X2 on which they perform a local channel \({{{{{{{{\mathcal{E}}}}}}}}}_{X}^{(\lambda )}\) (X = A, B, C) depending on a classical random variable λ.

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