Estimating Parameterized Entanglement Measure

preprint2022arXivOpen access

Abstract

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

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