title: Classifying N-qubit entanglement via Bell's inequalities.
abstract: All the states of N qubits can be classified into N-1 entanglement classes from 2-entangled to N-entangled (fully entangled) states. Each class of entangled states is characterized by an entanglement index that depends on the partition of N. The larger the entanglement index of a state, the more entangled or the less separable is the state in the sense that a larger maximal violation of Bell's inequality is attainable for this class of state.
authors.affiliation: Department of Modern Physics, University of Science and Technology of China, Hefei 230027, People's Republic of China.
authors.forename: Sixia
authors.initials: S
authors.lastname: Yu
authors.forename: Zeng-Bing
authors.initials: ZB
authors.lastname: Chen
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Pan
authors.forename: Yong-De
authors.initials: YD
authors.lastname: Zhang