A new entanglement measure based on the total concurrence

preprint2025arXivOpen access

Abstract

Quantum entanglement is a crucial resource in quantum information processing, advancing quantum technologies. The greater the uncertainty in subsystems' pure states, the stronger the quantum entanglement between them. From the dual form of qq-concurrence (q≥2q\geq 2) we introduce the total concurrence. A bona fide measure of quantum entanglement is introduced, the Cqt\mathcal{C}^{t}_q-concurrence (q≥2q \geq 2), which is based on the total concurrence. Analytical lower bounds for the Cqt\mathcal{C}^{t}_q-concurrence are derived. In addition, an analytical expression is derived for the Cqt\mathcal{C}^{t}_q-concurrence in the cases of isotropic and Werner states. Furthermore, the monogamy relations that the Cqt\mathcal{C}^{t}_q-concurrence satisfies for qubit systems are examined. Additionally, based on the parameterized αα-concurrence and its complementary dual, the Cαt\mathcal{C}^{t}_α-concurrence (0≤α≤12)(0\leqα\leq\frac{1}{2}) is also proposed.

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