Concurrence in the framework of coherent states

Authors:
K. Berrada;A. Chafik;H. Eleuch;Y. Hassouni
Affiliations:
Laboratoire de Physique Théorique, Faculté des sciences, Agdal, Rabat, Morocco;Laboratoire de Physique Théorique, Faculté des sciences, Agdal, Rabat, Morocco;Institute for Quantum Studies and Department of Physics, Texas A&M University, College Station, USA 77843;Laboratoire de Physique Théorique, Faculté des sciences, Agdal, Rabat, Morocco
Venue:
Quantum Information Processing
Year:
2010

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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.