Abstract
The concurrence of a two-qubit nonorthogonal pure state is determined through the construction of this state in the language of spin coherent states. The generalization of this method to the case of a class of mixed states is given. The concurrence in this case is nothing but a function of the amplitude of the spin coherent states, it is shown also that probability present an interesting behavior.
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Berrada, K., Chafik, A., Eleuch, H. et al. Concurrence in the framework of coherent states. Quantum Inf Process 9, 13–26 (2010). https://doi.org/10.1007/s11128-009-0124-y
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DOI: https://doi.org/10.1007/s11128-009-0124-y