Entangled multi-qubit states without higher-tangle

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We analyze mixed multi-qubit states composed of a W class state and a product state with all qubit in |0>. We find the optimal pure state decomposition and convex roofs for higher-tangle with bipartite partition between one qubit and the rest qubits for those mixed states. The optimality of the decomposition is ensured by the Coffman-Kundu-Wootters (CKW) inequality which describes the monogamy of quantum entanglement. The generalized monogamy inequality is found to be true for W class states with arbitrary partitions between one qubit and multi-qubit.
4 pages, 1 figure

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Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/133346

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0707.1578
 http://arxiv.org/abs/0707.1578

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arXiv