Physics – Quantum Physics
Scientific paper
2005-06-24
International Journal of Quantum Information Vol. 4, No. 3 (2006) 383-393
Physics
Quantum Physics
11 pages. Proceedings of the workshop "Entanglement in physical and information sciences", Centro Ennio de Giorgi, Pisa, Decem
Scientific paper
10.1142/S0219749906001852
It is a central trait of quantum information theory that there exist limitations to the free sharing of quantum correlations among multiple parties. Such 'monogamy constraints' have been introduced in a landmark paper by Coffman, Kundu and Wootters, who derived a quantitative inequality expressing a trade-off between the couplewise and the genuine tripartite entanglement for states of three qubits. Since then, a lot of efforts have been devoted to the investigation of distributed entanglement in multipartite quantum systems. In these proceedings we report, in a unifying framework, a bird's eye view of the most relevant results that have been established so far on entanglement sharing in quantum systems. We will take off from the domain of N qubits, graze qudits, and finally land in the almost unexplored territory of multimode Gaussian states of continuous variable systems.
Adesso Gerardo
Illuminati Fabrizio
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