Pairwise entanglement in symmetric multi-qubit systems
arXiv:quant-ph/0106145 · doi:10.1140/epjd/e20020045
Abstract
The concurrence, a quantitative measure of the entanglement between a pair of particles, is determined for the case where the pair is extracted from a symmetric state of N two-level systems. Examples are given for both pure and mixed states of the N-particle system, and for a pair extracted from two ensembles with correlated collective spins.
7 pages, 3 figures
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