A nonlinear criterion detects coherence transfer in quantum networks with only two measurements of network-state populations, remaining valid even with uncharacterized checkpoint nodes, and is experimentally shown in four- and six-photon entanglement networks.
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Coherence Transfer in Quantum Networks
A nonlinear criterion detects coherence transfer in quantum networks with only two measurements of network-state populations, remaining valid even with uncharacterized checkpoint nodes, and is experimentally shown in four- and six-photon entanglement networks.