N-Qubit W States are Determined by their Bipartite Marginals
classification
🪐 quant-ph
keywords
statesbipartitedeterminedn-qubitpurearbitraryclassconsider
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We prove that the most general W class of N-qubit states are uniquely determined among arbitrary states (pure or mixed) by just their bipartite reduced density matrices. Moreover, if we consider only pure states, then (N-1) of them are shown to be sufficient.
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