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Spectral properties of entanglement witnesses
2008
Journal of Physics A: Mathematical and Theoretical
Entanglement witnesses are observables which when measured, detect entanglement in a measured composed system. It is shown what kind of relations between eigenvectors of an observable should be fulfilled, to allow an observable to be an entanglement witness. Some restrictions on the signature of entaglement witnesses, based on an algebraic-geometrical theorem will be given. The set of entanglement witnesses is linearly isomorphic to the set of maps between matrix algebras which are positive,
doi:10.1088/1751-8113/41/37/375303
fatcat:dabghvllufggtgvmqk6yctzwte