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Symmetry

Entanglement of General Two-Qubit States in a Realistic Framework

S. Abdel‐Khalek, K. Berrada, Eied Mahmoud Khalil, Fadhel Almalki

Published Feb 27, 2021• 2 citations
Publisher

Abstract

In the present paper, we examine the quantum entanglement for more general states of two-qubit system in the context of spin coherent states (SCSs). We consider the concurrence as a quantifier of entanglement and express it in terms of SCSs. We determine new set of maximally entangled conditions that provide the maximal amount of entanglement for certain values of the amplitudes of SCSs for the case of pure states. Finally, we examine the entanglement of a class of mixed states of the two qubits and provide the range in which the entanglement value is maximal with respect to the values of the amplitudes of SCSs.

DOI
10.3390/sym13030386

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