In this paper, we shall develop a generic scheme to construct the criterion that an N-qubit state has true N-particle entanglement. For the N = 3 case, we show that violation of the Mermin＇s inequality │ E^LHV （σ^...In this paper, we shall develop a generic scheme to construct the criterion that an N-qubit state has true N-particle entanglement. For the N = 3 case, we show that violation of the Mermin＇s inequality │ E^LHV （σ^ x× σ^ y× σ^y ＋ σ^y × σ^x×σ^y ＋ σ^y ×σ^y× σ^x＆ -σ^x × σ^x ×σ^x）│≤2, is sufficient to confirm three-particle entanglement.展开更多
文摘In this paper, we shall develop a generic scheme to construct the criterion that an N-qubit state has true N-particle entanglement. For the N = 3 case, we show that violation of the Mermin＇s inequality │ E^LHV （σ^ x× σ^ y× σ^y ＋ σ^y × σ^x×σ^y ＋ σ^y ×σ^y× σ^x＆ -σ^x × σ^x ×σ^x）│≤2, is sufficient to confirm three-particle entanglement.
