Classifying N-qubit entanglement via Bell's inequalities.
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.
Yu
Sixia
S
Department of Modern Physics, University of Science and Technology of China, Hefei 230027, People's Republic of China.
Chen
Zeng-Bing
ZB
Pan
Jian-Wei
JW
Zhang
Yong-De
YD