Lewenstein-Sanpera decomposition of a generic 2 ⊗ 2 density matrix by using Wootters's basis


The Lewenstein-Sanpera decomposition for a generic two-qubit density matrix is obtained by using Wootters’s basis. It is shown that the average concurrence of the decomposition is equal to the concurrence of the state. It is also shown that all the entanglement content of the state is concentrated in the Wootters’s state |x1〉 associated with the largest… (More)


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