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2008

On the relation between Schmidt coefficients and entanglement

Aniello, Paolo, Lupo, Cosmo

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We consider the Schmidt decomposition of a bipartite density operator induced by the Hilbert-Schmidt scalar product, and we study the relation between the Schmidt coefficients and entanglement.

First, we define the Schmidt equivalence classes of bipartite states.
Each class consists of all the density operators (in a given bipartite Hilbert space) sharing the same set of Schmidt coefficients.
Next, we review the role played by the Schmidt coefficients with respect to the separability criterion known as the `realignment' or `computable cross norm' criterion; in particular, we highlight the fact that this criterion relies only on the Schmidt equivalence class of a state.

On the relation between Schmidt coefficients and entanglement · Around

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