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This Letter presents quantum mechanical inequalities which distinguish, for systems of n spin- 12 particles (n>2), between fully entangled states and states in which at most n-1 particles are entangled. These inequalities are stronger than those obtained by Gisin and Bechmann-Pasquinucci Phys. Lett. A 246, 1 (1998) and by Seevinck and Svetlichny quant-ph/0201046.
Jos Uffink (Thu,) studied this question.
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