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International Journal of Quantum Information

Entanglement of spin coherent mixed states

Mostafa Mansour, Y. Hassouni

Published Feb 1, 2016• 7 citations
Publisher

Abstract

In this paper, we quantify the amount of entanglement of bipartite mixed states represented by a statistical mixture of the more general type of two-qubit non-orthogonal states of the form: [Formula: see text], constructed by linearly independent spin coherent states. We use the concurrence as a measure of entanglement and we study its behavior in terms of the amplitudes of SU(2) coherent states.

DOI
10.1142/s0219749916500040

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In this paper, we quantify the amount of entanglement of bipartite mixed states represented by a statistical mixture of the more general type of two-qubit non-orthogonal states of the form: [Formula: see text], constructed by linearly independent spin coherent states. We use the concurrence as a measure of entanglement and we study its behavior in terms of the amplitudes of SU(2) coherent states.
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The purpose of this conference paper is to investigate the entanglement of a more general type of two qubitsnonorthogonal pure state by using the linear entropy as a measure of the degree of bipartite entangle-ment. Moreover, we study the behaviour of this entanglement measure in the context of Su(2)-coherentstates theory and we reformulate it as a function of some new parameters that specify coherent states.Finally we find some conditions for maximal and minimal entanglement of nonorthogonal states interms of the amplitudes of spin coherent states