Estimating Parameterized Entanglement Measure

Abstract

The parameterized entanglement monotone, the q-concurrence, is also a reasonable parameterized entanglement measure. By exploring the properties of the q-concurrence with respect to the positive partial transposition and realignment of density matrices, we present tight lower bounds of the q-concurrence for arbitrary q≥slant 2. Detailed examples are given to show that the bounds are better than the previous ones.

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