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I-concurrence and tangle for isotropic states
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I-concurrence and tangle for isotropic states
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We discuss properties of entanglement measures called I-concurrence and tangle. For a bipartite pure state, I-concurrence and tangle are simply related to the purity of the marginal density operators. The I-concurrence (tangle) of a bipartite mixed state is the minimum average I-concurrence (tangle) of ensemble decompositions of pure states of the joint density operator. Terhal and Vollbrecht [Phys. Rev. Lett. 85, 2625 (2000)] have given an explicit formula for the entanglement of formation of isotropic states in arbitrary dimensions. We use their formalism to derive comparable expressions for the I-concurrence and tangle of isotropic states.
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Cited by 1 Pith paper
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Exploring the Geometric and Dynamical Properties of Spin Systems and Their Interplay with Quantum Entanglement
This thesis explores geometric and dynamical properties of entanglement in two- and many-body spin systems under XXZ and Ising interactions using phase space and Fubini-Study geometry.
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