title: Comprehensive test of entanglement for two-level systems via the indeterminacy relationship.
abstract: A 3-setting Bell-type inequality enforced by the indeterminacy relation of complementary local observables is proposed as an experimental test of 2-qubit entanglement. The proposed inequality has the advantage of being a sufficient and necessary criterion of separability. Therefore any entangled 2-qubit state cannot escape the detection by this kind of test. It turns out that the orientation of the local testing observables plays a crucial role in our perfect detection of entanglement.
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: Jian-Wei
authors.initials: JW
authors.lastname: Pan
authors.forename: Zeng-Bing
authors.initials: ZB
authors.lastname: Chen
authors.forename: Yong-De
authors.initials: YD
authors.lastname: Zhang