Spectral extrema of normalized entanglement witnesses are characterized, with a proven divergence between decomposable and nondecomposable witnesses and a universality theorem for nondecomposable detection of NPT states.
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Spectral characterizations of entanglement witnesses
Spectral extrema of normalized entanglement witnesses are characterized, with a proven divergence between decomposable and nondecomposable witnesses and a universality theorem for nondecomposable detection of NPT states.